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AG | 10oz


This page contains our current information on 10oz class Engelhard silver production bars and Legacy Ingots.  
For many collectors and investors, the 10oz Engelhard bar represents the standard and preferred bullion choice. Engelhard 10oz bars are a comfortable size to handle and serve as an ideal store of value for investment and trade.

As with the smaller weight class Legacy Ingots, Engelhard 10oz ingot lineage witnessed many variations through early production years.  These variations include placement of hallmark, weight and purity stamping as well as frequently erratic and crude serial stamping.  Amazingly, these ingots were generally considered junk bars and frequently melted itedtil just a decade ago, when collectors began to appreciate their inherent beauty and undeniable scarcity. Engelhard 10oz Legacy Ingots are now among the most sought after on the collector front. 

The most well-recognized of the 10oz bars are the ‘P’ prefix 7th and 10th series poured bars, produced at the Plainville, Massachusetts plant in the late 1970’s.  These examples were designated ‘P’ prefix to represent the Plainville facility.  These bars, along with the later 11th series pressed bars, have been regarded as the benchmark of Engelhard investment grade bars.  With total production of approximately 100,000 ingots combined for 7th and 10th series, and 200,000 +/- for 11th series, they were relatively common in their day.  However, many have been melted over the years, further fueling the collector market’s high demand for these iconic bullion examples.  The 12th series ‘P’ and ‘C’ struck commercial bars are also gaining enthusiasm in the collector world, as the availability of earlier series bars continues to quickly diminish.

Portrait Varieties
Landscape Varieties [United States]
Landscape Varieties [Australian]
Landscape Varieties [Canadian]

Serial Number Reference

Portrait Varieties:
EXAMPLE HALLMARK OBVERSE REVERSE COMMENTARY SAMPLE SERIAL NUMBERS ICR | MINTAGE
10oz P Series P130516 ThumbLarge ‘E’ Hallmark | MC Absent
[Globe Logo]  [10 TROY OUNCES]  [FINE SILVER]  [999+]  [Hallmark in Elongated Octagon]  [Serial Number]
Hallmark in Elongated Octagon, repeated 4 full times.  All Engelhard is appreciative to MP for providing the much needed definitives for this variety. 1st series standard commercial bar in P-Series variation, circa 1984.  Our archives confirm that Engelhard assigned letter prefix in reverse order, in that ‘P’ series preceded ‘C’ series. P129952
P130516
ICR Tier 2 - Small <750
MINTAGE
Screen Shot 2016-07-12 at 10.58.08 AMLarge ‘E’ Hallmark | MC Absent
[Globe Logo]  [10 TROY OUNCES]  [FINE SILVER]  [999+]  [Hallmark in Elongated Octagon]  [Serial Number]
Hallmark in Elongated Octagon, repeated 4 full times1st series standard commercial bar in exceedingly rare ‘WC’ serial prefix.WC001ICR Tier 1 - Small<25
MINTAGE
Engelhard_10Oz_CSeriesLargeESmallScreen Shot 2014-05-03 at 9.52.23 AM Large ‘E’ Hallmark | MC Absent
[Globe Logo]  [10 TROY OUNCES]  [FINE SILVER]  [999+]  [Hallmark in Elongated Octagon]  [Serial Number]
Hallmark in Elongated Octagon, repeated 4 full times 2nd series standard commercial bar in C-Series and occasional D-Series variation, circa 1985.  Similar to above w/ exception of larger ‘E’ Logo within globe and variation of ‘ENGELHARD’ logo, most noticeably in the ‘G’. C319832
C383787
C404908
C474007
C609085
C673429
C774350
C746069
D618256
ICR Tier 5 - Small 450,000
MINTAGE
10oz-Scotiabank-Obverse Maple Leaf Hallmark
[Scotiabank Company Logo]  [Scotiabank]  [FINE SILVER 999 in Rectangle]  [10 OUNCES TROY]
[Maple Leaf Hallmark]  [Assayers & Refiners]  [Serial Number in Bull Logo Frosted Rectangle] Canadian portrait bar in Scotiabank counterstamp variation, circa 1985.  Additional information regarding the Scotiabank counterstamp may be found at this LINK. 001515
001569
001628
001705
001905
ICR Tier 1 - Small<250
MINTAGE
10oz Maple Blank Reverse Maple Leaf Hallmark
[Maple Leaf Hallmark]  [Assayers & Refiners]  [10 TROY OUNCES]  [FINE SILVER 999 in Square]  [Serial Number in Bull Logo Frosted Rectangle]
Blank Canadian portrait bar in standard Maple Leaf variety, circa 1985. 330371
330435
330509
330551
ICR Tier 1 - Small <250
MINTAGE
10oz-Scotiabank-Obverse Maple Leaf Hallmark [Maple Leaf Hallmark]  [Assayers & Refiners]  [10 TROY OUNCES]  [FINE SILVER 999 in Square]  [Serial Number in Bull Logo Frosted Rectangle] TD BANK Logo, repeated six full times Canadian portrait bar in Toronto Dominion Bank counterstamp variation, circa 1985.  Additional information regarding the Toronto Dominion counterstamp may be found at this LINK. 329388
329913
411028
411029
ICR Tier 2 - Small <1,000
MINTAGE
10oz-JM-MTB.20-PM-copy-297x300  ‘E’ in Elongated Octagon [Statue of Liberty]  [LIBERTY] [Statue of Liberty Torch Logo]  [LIBERTY TRADE SILVER]  [.999+ FINE SILVER]  [TEN TROY OUNCES]  [SERIAL NUMBER]  [© 1986 MTB]  [UNITED STATES OF AMERICA]   Specialty collector bar produced for Manfra, Tordella & Brookes, 1986 mintage.  It is important to note that the Metal Arts Company [MA] produced the first 10oz bars for MTB, serial range 1 to 5,000.  JM produced them in wide and narrow formats.  All Engelhard estimates serial range 6,500 to 16,000 and there appears to be a 1,500 serial number gap between MA, JM and Engelhard production runs. Additional information regarding the MTB counterstamp may be found at this LINK. 17696
18090
18326
19814
20336
21306
21808
24398
25139
ICR Tier 3 - Small <7,500
MINTAGE
Engelhard_10Oz_CSeriesEagle Eagle & Flag Hallmark
[Eagle & Flag Hallmark]  [Engelhard Triangle Hallmark]  [999+ Fine SILVER]  [10 Troy Ounces]  [Serial Number]
Engelhard Triangle Hallmark, repeated 9 full times 3rd series standard commercial bar in C-Series variation, 1987 mintage. C106086
C111756
C798425
C822910
C895361
C982744
ICR Tier 5 - Small 300,000
MINTAGE


Landscape Varieties [United States]:
EXAMPLE HALLMARK OBVERSE REVERSE COMMENTARY SAMPLE SERIAL NUMBERS ICR | MINTAGE
IMG_4494IMG_8465Top Hallmark[Hallmark in Elongated Octagon]  [10.000]  [999]  [Serial Number]Cast Finish1st series ingot.  Crude casting finish, non ‘+’ variety.  Three known examples.  Ingot 00627 sold privately on February 20, 2017 for $3,250.00.   00627
00656
00706
ICR Tier 1 - Small<25
MINTAGE
IMG_00001541 copyphoto copy Top Hallmark [Hallmark in Elongated Octagon]  [10.000]  [999+]  [Serial Number] Cast Finish 2nd series in 4-digit serial variation. 3084
3085
3088
3091
ICR Tier 1 - Small <50
MINTAGE
10oz AG - 01549 copy
img_6438-copy-2
Top Hallmark [Hallmark in Elongated Octagon]  [10.000]  [999+]  [Serial Number] Cast Finish 2nd series in 5-digit serial variation.  Observed in weight class and purity stamp placement variation, pictured.  Ingot 01605 sold privately on March 15, 2017 for $2,300.00. 01549
01605
02162
02236
02882
02966
ICR Tier 1 - Small <250
MINTAGE
10oz Top Logo 09974Top Hallmark[Hallmark in Elongated Octagon]  [Serial Number]  [10.000]  [999+]
Cast Finish2nd series in 5-digit serial and stamp placement variations.  This particular example was acquired directly form the daughter of a former Engelhard executive who served on the board of directors at the New Jersey Engelhard facility.  Reportedly, these bars were produced in very limited quantity as gifts for the board of directors.
09974ICR Tier 1 - Small12
MINTAGE
IMG_2778 copyIMG_20140225_181511 Mid Hallmark
[10.000]  [999+]  [Hallmark in Elongated Octagon]  [Serial Number]
Cast Finish 3rd series in 4-digit serial variation, occasionally seen with higher placement of weight class and purity stampings.  Ingot 3530 sold privately on May 13, 2017 for $2,500.00. 3498
3525
3530
3536
ICR Tier 1 - Small <50
MINTAGE
Engelhard_10Oz_OldPourNoSerialObvSmall Mid Hallmark
[10.000]  [999+]  [Hallmark in Elongated Octagon]
Cast Finish 3rd series in unique serial absent variation. N/A ICR Tier 1 - Small <100
MINTAGE
10oz - 04144Mid Hallmark
[10.000]  [999+]  [Hallmark in Elongated Octagon]  [Serial Number]
Cast Finish3rd series in 5-digit serial variation with leading zero format.  These zero [0] prefix bars are believed to have been produced in 1971, or prior.  Please note sample serial numbers listed in the right column do not represent the only known examples.  We have record of considerably more surviving examples.
02882
03832
03833
04653
05607
06475
07253
08536
09922
ICR Tier 1 - Small<500
MINTAGE
Screen Shot 2017-03-20 at 3.44.17 PMIMG_5908-001 Mid Hallmark
[10.000]  [999+]  [Hallmark in Elongated Octagon]  [Serial Number]
Cast Finish 3rd series in 5-digit serial variation, occasionally seen with smooth, reflective finish as observed on the 71297 ingot pictured.  Many studied examples across serial number range demonstrate small variations of font die and casting shape.  We believe the wider spacing on weight and purity stampings began around 75xxx.  Despite the seemingly wide serial number range, we believe these 5-digit ingots were only produced randomly in small runs and are, in fact, quite rare.
11901
13383
15257
30663
38294
41033
57317
63167
63194
63716
71297
77678
ICR Tier 2 - Small  <5,000
MINTAGE
Resized_20170516_121442Mid Hallmark
[10.000]  [999+]  [Hallmark in Elongated Octagon]  [Serial Number]
Cast Finish3rd series in 5-digit serial variation with very rare zero-prefix serial assignment.  One known example.013720ICR Tier 1 - Small<25
10oz-United-0776510oz UNITED 07777 Thumb
IMG_9126
Left Hallmark
[Custom ‘UNITED’ Hallmark]  [10.000]  [999+]  [Serial Number]
Cast Finish 3rd series in 5-digit serial, United Refining counterstamp variation.  These ingots were produced with  different placements of the United hallmark, this example demonstrates a left-side placement.  Ingot 07777 sold privately on January 9, 2017 for $3,300.00.  Additional information may be found at this LINK. 07701
07710
07765
07771
07777
07778
ICR Tier 1 - Small <75
MINTAGE
IMG_9127Right Hallmark
 [10.000]  [999+]  [Custom ‘UNITED’ Hallmark]  [Serial Number]
Cast Finish3rd series in 5-digit serial, United Refining counterstamp variation.  These ingots were produced with  different placements of the United hallmark, this example demonstrates a right-side placement.  Additional information may be found at this LINK.07792ICR Tier 1 - Small<50
MINTAGE
10oz-AG-15428 Mid Hallmark  [10.000]  [999+]  [Custom ‘UNITED’ Hallmark]  [Serial Number] Cast Finish   3rd series in 5-digit serial, United Refining counterstamp variation.  These ingots were produced with different placements of the United hallmark, this example demonstrates a mid-ingot placement.  Ingot 15407 sold privately on March 15, 2017 for $3,350.00.  Additional information may be found at this LINK. 15407
15420
15428 
ICR Tier 1 - Small <50
MINTAGE
Screen Shot 2016-06-21 at 11.19.01 AM10oz ACLI

Top Left Hallmark [ACLI International] [Serial Number]  [10.000]  [999+] 3rd series in 5-digit serial, ACLI International counterstamp variation.  These ingots are a unique counterstamp variation as the serial number, weight class and purity stampings were placed on the reverse of the bar.  All Engelhard has authenticated two of these examples in hand through ingot micrometer measurements and full font study.  Additional information may be found at this LINK. 10057
10098
10107
10110
ICR Tier 1 - Small <25
MINTAGE
IMG_1210IMG_1209
IMG_8614
IMG_8616



Top Left Hallmark[MMI] [999 + Fine] [Serial Number]Cast Finish3rd series in 5-digit serial, Monetary Metals International [MMI] variation.  All Engelhard has authenticated one of these examples in hand through ingot micrometer measurements and full font study.  Also produced in 3oz and 25oz weight class.  Interestingly, these pieces were produced for clients and demonstrate highly polished sides and reverse with custom engraving.  The polishing process resulted in slight altercation of weight class on this example.  Originally a 10oz weight class, ingot 10146 weighs 297.34g, or 9.56oz.  Additional information regarding Monetary Metals International counterstamp may be found at this LINK.10146
10165
ICR Tier 1 - Small<25
MINTAGE

EngelhardFPM600
Mid Hallmark
[10.000]  [999+]  [Hallmark in Elongated Octagon]  [Custom ‘FPM’ Counterstamp]  [Serial Number]
Cast Finish 3rd series in 5-digit serial, FPM [Fleet Precious Metals] counterstamp variation.  Additional information may be found at this LINK. 10078
ICR Tier 1 - Small <100
MINTAGE
811855 811855 Small811864 811864 Small11948 11948 Small Mid Hallmark
[10.000]  [999+]  [Hallmark in Elongated Octagon]  [Serial Number] 
Cast Finish
3rd series in 6-digit serial variation with a number ‘8’ leading prefix.  This variety demonstrates a ‘^’ over-stamp to the left of serial number.  The serial number errors on these pieces resulted from part of the letter ‘X’ that was used as a filler for the lead position on the rotary stamp.  This leading filler ‘X’ slipped out of position just enough to leave an impression of the bottom or top half of the letter.  The bottom picture, bar 11948, demonstrates the bottom half of the same ‘8’ that was stamped on previous pieces had slipped back into the same position as the leading ‘X’ number to its left.  Also note the strength of the impression left by leading number ‘8’ due to its lack of use. We have registry entries noted for these error pieces in very tight ranges between 811855 to ‘8’14487 to include the unique ‘Y’ prefix variety such as ‘Y’12590 and believe that this range was shared with the 100oz examples with zero prefix.  We estimate partial ‘X’ ‘8’ error stamp variety mintage at <250.  Ingot 811864 sold privately on February 20, 2017 for $1,200.00.
‘^8’11855
‘^8’11858
‘^8’11864
‘^8’11868
‘8’14487
ICR Tier 1 - Small<50
MINTAGE
IMG_0784Mid Hallmark
[10.000]  [999+]  [Hallmark in Elongated Octagon]  [Serial Number] 
Cast Finish
3rd series in 6-digit serial variation with a letter ‘X’ and number ‘8’ leading prefix.   The serial number error on this piece resulted from the letter ‘X’ that was used as a filler for the lead position on the rotary stamp as well as the slipping of the number ‘8’ lead.  One known example, illustrated, that includes a full and perfectly struck error ‘X’ and ‘8’ serial prefix.
‘X8’11882
ICR Tier 1 - Small<5
MINTAGE

[Included in
<50
mintage
estimate,
above]
IMG_0785Mid Hallmark
[10.000]  [999+]  [Hallmark in Elongated Octagon]  [Serial Number] 
Cast Finish
3rd series in 6-digit serial variation with a letter ‘Y’ leading prefix.   The serial number error on this piece resulted from the letter ‘Y’ that was used as a filler for the lead position on the rotary stamp.  One known example, illustrated, that includes a full and perfectly struck error ‘Y’ serial prefix.
‘Y’ 12590ICR Tier 1 - Small<5
MINTAGE

[Included in
<50
mintage
estimate,
above]
unnamedphoto-76 copyphoto-66 copy10oz - 65244 MFR Mid Hallmark
[10.000]  [999+]  [Hallmark in Elongated Octagon]  [Serial Number]  [MFR Designation]
Cast Finish 3rd series in 5-digit serial variation with ‘MFR’ [Metals Fabrication & Refining] designation.  We believe these were produced in specific serial runs of 59xxx and 65xxx and have estimated mintage accordingly for 50 pieces on each run. It is important to note that ‘MFR’ is not a serial number suffix as some collectors may claim.  The 100oz class examples confirm this as their serial number and ‘MFR’ designation are stamped on opposed corners of the ingot.  As a note, on August 6, 2015, ingot 59184 MFR sold on eBay to high bidder at $1,570.99, and on August 10, 2015, ingot 59186 MFR was listed on eBay by the same seller and sold at a fixed price of $1,750.00. 36229 ‘MFR’
36405 ‘MFR’
59181 ‘MFR’
59182 ‘MFR’
59184 ‘MFR’
59186 ‘MFR’
59189 ‘MFR’
59190 ‘MFR’
59191 ‘MFR’
59192 ‘MFR’
65191 ‘MFR’
65244 ‘MFR’
ICR Tier 1 - Small <100
MINTAGE
Screen Shot 2017-08-17 at 8.57.00 AM

Mid Hallmark
[10.000]  [999+]  [Hallmark in Elongated Octagon]  [Serial Number]
Cast Finish 3rd series in 5-digit variation, similar to our examples above except weight class and purity stampings are spaced further apart.  We speculate, at this time, that serial numbers included only 77, 78, 79, 80, 85 and 86 prefix. 77848
77853
78090
79764
80326
80631
80653
85437
86828
86860
86876
86924
ICR Tier 2 - Small <1,000
MINTAGE
Engelhard_10Oz_999TopNoBullObvSmall Mid Hallmark
[999+]  [10.000]  [Hallmark in Elongated Octagon]  [Serial Number]
Cast Finish 3rd series in 5-digit serial variation, similar to our example above except weight class and purity stampings are reversed.  Possibly an early Canadian variation. 79104
79197
79485
79566
79567
79568
79624
ICR Tier 1 - Small <100
MINTAGE
Engelhard_10Oz_ThinThreeZerosObvSmall-1 Mid Hallmark
[10.ooo]  [999+]  [Hallmark in Elongated Octagon]  [Serial Number]
Cast Finish 4th series in 5-digit serial variation.  Only variety with smaller trailing zeros in weight stamp, transitional piece in eliminating trailing zeros altogether, last example without T.OZ or TR. OZ. suffix. 14431
15448
15480
16295
16494
16553
ICR Tier 2 - Small <1,000
MINTAGE
396182328@photo.JPG_photo Mid Hallmark
[10.ooo]  [999+]  [Hallmark in Elongated Octagon]  [Serial Number]
Cast Finish 4th series in 6-digit serial variation.  Same as our example above, except in 6-digit serial with zero prefix.  Only variety with smaller trailing zeros in weight stamp, transitional piece in eliminating trailing zeros altogether, last example without T.OZ or TR. OZ. suffix.   015602
015612
015771
ICR Tier 1 - Small <150
MINTAGE
 
[Included in
<1,000
mintage
estimate,
above]
OLYMPUS DIGITAL CAMERA Mid Hallmark
[10 T.OZ]  [Hallmark in Elongated Octagon]  [999+ FINE SILVER]  [Serial Number]
Cast Finish 5th series in very unique 7-digit serial number variation.  Some examples have blanks where leading zeros would go [I.E. the faint outline of the rectangle of a blank where a number would otherwise be]. One sold in April, 2013 for about 5x melt value.  Believed to be prototype piece or limited run for private collectors.  This piece was first to eliminate trailing weight stamp zeros and first to detail ‘Troy Ounces’ suffix.  Additional details may be found at this LINK. 0000062
0000075
0000076
0000077
0000125
ICR Tier 1 - Small <50
MINTAGE
IMG_5891 Mid Hallmark
[10 T.OZ]  [Hallmark in Elongated Octagon]  [999+ FINE SILVER]  [Serial Number]
Cast Finish 5th series in standard production 5-digit serial variation.  Similar to our example above, ingot demonstrates a more unified casting shape.  We believe serial number range for this series is 16575 to 20999 with sporadic number assignment shared amongst 5oz and 100oz class, without duplications. 16597
17366
17446
18000
18737
19038
19368
19900
20164
20737
ICR Tier 2 - Small <2,500
MINTAGE
unnamedMid Hallmark
[10 T.OZ]  [Hallmark in Elongated Octagon]  [999+ FINE SILVER]  [Serial Number]
Cast Finish5th series in standard production 5-digit serial variation with ‘+’ serial number stamp application error.  One known example.19810ICR Tier 1 - Small1
MINTAGE
IMG_5197Mid Hallmark
[10 T.OZ]  [Hallmark in Elongated Octagon]  [999+ FINE SILVER]  [Serial Number]
Cast Finish5th series in standard production 5-digit serial variation with ‘-‘ serial prefix anomaly.  Ingot -17676 sold privately for $1,250.00 on January 1, 2017.  -17755
-17636
-17676
ICR Tier 1 - Small<50
MINTAGE
Screen Shot 2015-11-03 at 9.57.37 AMMid Hallmark
[10 T.OZ]  [Hallmark in Elongated Octagon]  [999+ FINE SILVER]  [Serial Number]
Cast FinishUnique prototype production ingot, only known example.  This bar has a matching 20oz counterpart, also in ‘C’ serial prefix.  One known example.C107
C131
ICR Tier 1 - Small<50
Engelhard_10Oz_TOzLargeLogoObvSmall Mid Hallmark
[10 T.OZ]  [Hallmark in Elongated Octagon]  [999+ FINE SILVER]  [Serial Number]
Cast Finish 6th series in ‘P’ serial prefix variation. One example reportedly sold in April, 2013 for $2,000.00.  These pieces were made in haste to supply physical demand during Hunt Brother’s period and demonstrate a hybrid design of T. OZ design and ‘P’ series serial format. Additional details may be found at this LINK. P000013
P000060
P000116
P000493
P000553
P000647
P000651
P000653
ICR Tier 1 - Small <500
MINTAGE
Screen Shot 2014-03-11 at 8.09.26 AM Mid Hallmark
[99.9+ FINE SILVER]  [Custom ‘SilverTowne’ Hallmark]  [10 TR. OZ.]  [Serial Number]
Cast Finish 6th series in series in ‘P’ serial prefix and SilverTowne counterstamp variation.  In-hand study confirms earlier numbers in this variation have casting match to its ‘Engelhard’ 5th series ingot with flat top, while later numbers have pillow top appearance.  Between serial P000800 and P001410 the obverse stamping method changed, most noticeably in the rotary stamp application, as demonstrated in the photos.  Estimated serial number range P000001 to P001499 shared with Engelhard 5th and 6th series.  P000045 sold privately on February 20, 2017 for $2,600.00.  P000800 sold privately on March 15, 2017 for $2,500.00. P000045
P000646
P000759
P000800
P001084
P001151
P001410
P001481
ICR Tier 1 - Small <300
MINTAGE
Screen Shot 2017-05-12 at 8.56.47 AM Mid Hallmark
[99 9+]  [FINE SILVER]  [10 TR. OZ.]  [Hallmark in Elongated Octagon]  [Serial Number]
Cast Finish

7th series in ‘P’ serial prefix variation, these examples have an obverse and reverse with approximately the same surface area.  There are two variations of purity designation in this series. They include approximate serial range P000700 – P000900, which demonstrates a decimal in ’99.9+’.  Approximate range P000900 – P001150 demonstrates a space in ’99 9+’.  Current estimate is <150 of each variation.  The above serial runs are shared with 6th series ‘P’ SilverTowne ingots, shown above. 

P000715
P000733
P000835
P000884
P001057
P001064
P001150
ICR Tier 1 - Small<300
MINTAGE
7th
Screen Shot 2017-05-19 at 8.43.11 AM
20170512_184437
Mid Hallmark
[99 9+]  [FINE SILVER]  [10 TR. OZ.]  [Hallmark in Elongated Octagon]  [Serial Number]
Waffle Back Cast Finish started around P010000 7th series in ‘P’ serial prefix variation, these examples demonstrate tapered leading edges [side slanting inward from top to bottom] so that the top has more surface area than the bottom.  Note the space in ’99 9+’ purity designation.  Some early 10th series bars were assigned serial numbers within the high serial range of 7th series during production transition, such as P076324.  We believe complete transition from 7th series to standard production 10th series occurred close to serial number P076654.  Note the bottom photo shows this variety with a letter ‘K’ below the blank serial prefix stamp.  While the Waffle Back pattern was common on these production pieces after serial assignment P010000, it is important to note that there are production anomalies on these examples due to backfilling of serial number assignment. As such, it is not uncommon for a regular cast finish reverse to be observed on an ingot in serial range beyond the approximate estimated staring point of P010000.
P001761
P002099
P003125
P008187
P009647
P015856
P025069
P025472
P038861
P055027
P062235
P069134
P070032
P074468
P076255
P076477
P076654
ICR Tier 4 - Small <50,000
MINTAGE
IMG_365310oz-Silvertowne-P002311 Mid Hallmark
[99 9+]  [FINE SILVER]  [10 TR. OZ.]  [Custom ‘SilverTowne’ Hallmark]  [Serial Number]
Cast Finish 8th series in ‘P’ serial prefix and SilverTowne counterstamp variation.  Note the space in ’99 9+’ purity designation.  Estimated serial number range P001500 to P002999.  Ingot P001756 sold via eBay auction for $1,525.00 on March 25, 2017.  Additional information may be found at this LINK. P001659
P001773
P002311
ICR Tier 1 - Small <300
MINTAGE
396508156@photo_1.JPG_photo_1Engelhard-poured-10oz-frontmaxresdefault396508671@photo_5.JPG_photo_5 Mid Hallmark
[999+]  [FINE SILVER]  [10 TR. OZ.]  [Hallmark in Elongated Octagon]  [Serial Number]
Cast Finish 9th series in ‘W’ serial prefix variation, produced exclusively at the ‘Engelhard West’ recycling facility operated in Anaheim, California in operation from 1979-2000.  It is possible that production timeframe overlapped on both ‘W’ and ‘P’ series ingots.  NOTE: Between W009073 – W009651 the production process changed from grinding excess weight from edges to removing from obverse.  We believe this practice was exclusive to the Anaheim recycling facility and have included photos of an early and later production example for comparison as well as two ingots close to this production transition.  Estimated serial number range W000001 to W017999. W000025
W000092
W000704
W001688
W002288
W003585
W004992
W005340
W006661
W007552
W008360
W009651
W010839
W011233
W012641
W013797
W014218
W015724
W016724
W017818
ICR Tier 3 - Small <18,000
MINTAGE
9thphoto_1-4photo-67 copy Mid Hallmark
[999+]  [FINE SILVER]  [10 TR. OZ.]  [Hallmark in Elongated Octagon]  [Serial Number]
Waffle Back Cast Finish
10th series in ‘P’ serial prefix variation, last variety in truly old-poured form.  Note the reverse of these examples occasionally demonstrate a ‘reverse’ convex stamping impression of the top line found on the observe.  We have included multiple photos to demonstrate reverse pattern variations and believe this was caused by an inadvertent stamping of the production line surface when a bar was not present.  The stamping force altered the production line surface area in such a way that the hex-screw head pattern also began leaving an impression.  Some early 10th series bars were assigned serial numbers within the high serial range of 7th series during production transition, such as P076324.  We believe complete transition from  7th series to standard production 10th series occurred close to serial number P076654.  This ‘P’ prefix serial run was also more commonly shared with 11th and 12th series 10oz ‘P’ class, 8th series 100oz extruded class and 1st series portrait ‘Tall E’ extruded class.
P076324
P076901
P080047
P096314
P111411
P137727
P153447
P155178
P166500
ICR Tier 4 - Small <50,000
MINTAGE
received_10209018480129449received_10209018480969470received_10209018481689488
Screen Shot 2017-05-04 at 11.17.28 AM
Mid Hallmark
[999+]  [FINE SILVER]  [10 TR. OZ.]  [Custom COLONIAL REFINING Hallmark]  [Serial Number]
Flat Extruded Finish
10th series extruded bar produced by Engelhard for Colonial Refining, Inc.  Two known examples.  On May 23, 2017 both examples sold.  P001445 sold on eBay auction for $2,365.00 and P001177 sold privately for $2,500.00.  
P001177
P001445
ICR Tier 1 - Small<100
MINTAGE
10oz P000001 Obverse
10oz P000001 Reverse
10oz P000001 Side
Mid Hallmark
[999+]  [FINE SILVER]  [10 TR. OZ.]  [Hallmark in Elongated Octagon]  [Serial Number]
 Flat Extruded Finish
11th series prototype bar.  Measures 66.29mm x 38.10mm x 12.19mm.  Obverse surface area measures 36.83mm due to variances in leading edge angles.  Based on production method and shape of this bar, we believe it also possible this is a prototype bar of the 10oz industrial E bar, defined below.  Thanks to S.S. for the pictures!
P000001ICR Tier 1 - Small<10
MINTAGE
Engelhard 10oz front
unnamed
Mid Hallmark
[999+]  [FINE SILVER]  [10 TR. OZ.]  [Hallmark in Elongated Octagon]  [Serial Number]
Flat Machined Finish11th series example that Engelhard employees could commission to be made with their initials incorporated into the serial number.  Bar IDI 001 was sold via eBay private sale for $2,000.00 on August 29, 2015.  These bars were originally produced with a brilliant reflective finish.
IDI 001
MDN 001
ICR Tier 1 - Small<50
MINTAGE
$(KGrHqN,!rEFGi2Q!M8WBRrk5-!N!w~~60_57$(KGrHqF,!rMFGk66twjFBRrk5-iVF!~~60_57$_57 Mid Hallmark
[999+]  [FINE SILVER]  [10 TR. OZ.]  [Hallmark in Elongated Octagon]  [Serial Number]
Flat Machined Finish 11th series in ‘P’ serial prefix variation, one seller stated that they bought their bar in 1983 [P299370]. Note the reverse of these examples occasionally demonstrate a ‘reverse’ convex stamping impression of the top line found on the observe.  We believe this was caused by an inadvertent stamping of the production line surface when a bar was not present.  The stamping force altered the production line surface area in such a way that the hex-screw head pattern also began leaving an impression.  Evidence suggests this span was shared with 100oz ‘W’ bars and later ‘P’ bars that were within the +/- P090000 – P430000 range.  Some examples issued in plastic protective cover, pictured below and very rarely seen.
IMG_3908
P089076
P090763
P110500
P150918
P165734
P210479
P211984
P265799
P299370
P392689
P417694
P429244
ICR Tier 5 - Small <200,000
MINTAGE
Engelhard_10Oz_PSeriesPouredStandardNoSerialSmall Mid Hallmark
[999+]  [FINE SILVER]  [10 TR. OZ.]  [Hallmark in Elongated Octagon]
Flat Machined Finish
11th series in ‘P’ serial prefix variation, similar to our example above except in serial absent format. 
N/A ICR Tier 1 - Small <100
MINTAGE
Engelhard_10Oz_GoldStandardObvSmall Mid Hallmark
[Custom ‘Gold Standard Corporation’ Hallmark in Elongated Octagon]  [Serial Number]  [999+]  [FINE SILVER]  [10 TR OZ]
Flat Machined Finish
11th series ‘P’ serial prefix in Gold Standard counterstamped variation.  Despite relatively high estimated mintage, these are rarely seen.  Additional details regarding the Gold Standard counterstamp may be found at this LINK.
P418567
P429987
P430051
P430542
ICR Tier 2 - Small <1,000
MINTAGE
Screen Shot 2017-07-28 at 9.26.24 AMTop Hallmark 
 [Hallmark in Elongated Octagon]  [10 TROY OZ.]  [999+ FINE SILVER]  [Serial Number]
 Hallmark in Elongated Octagon, repeated 3 full times, course pebbled finish
12th series Variety “A” in ‘P’ serial prefix transitional piece, last of the ‘P’ series run, less frequently seen.  This particular example is a very rare early variety of the more commonly found example listed directly below.  Differences include font thickness on obverse and reverse hallmark logos as well as the ‘+’ font found on ‘999+’.  Two known examples.
P100276
P104653
ICR Tier 1 - Small<250
MINTAGE
778 Top Hallmark   [Hallmark in Elongated Octagon]  [10 TROY OZ.]  [999+ FINE SILVER]  [Serial Number]  Hallmark in Elongated Octagon, repeated 3 full times, course pebbled finish 12th series Variety “A” in ‘P’ serial prefix transitional piece, last of the ‘P’ series run, less frequently seen.  This serial number run was shared with 10th and 11th ‘P’ series bars as well as 100oz ‘P’ series bars.  Note that some serial numbers are duplicated with 12th series ‘C’ prefix, as seen in P118193 and C118193, listed below. P100612
P114579
P117731
P118193
P120681
P126365
ICR Tier 3 - Small <10,000
MINTAGE
Engelhard_10Oz_CSeriesWideFrostedBackObvSmallTop Hallmark  [Hallmark in Elongated Octagon]  [10 TROY OZ.]  [999+ FINE SILVER]  [Serial Number] Smooth pebbled finish12th series Variety “B”, similar to our example above but in “C”serial prefix variation, except the reverse demonstrates a fully-pebbled finish.  Note that some serial numbers are duplicated with 12th series ‘P’ prefix, as seen in C118193 and P118193, listed above.  Serial range span from C100000 – C149999.C108035
C113645
C118193
C145464
ICR Tier 4 - Small<50,000
MINTAGE 
IMG_4834 IMG_4835 Top Hallmark  [Hallmark in Elongated Octagon]  [10 TROY OZ.]  [999+ FINE SILVER]  [Serial Number]  Hallmark in Elongated Octagon, repeated 3 full times, smooth pebbled finish 12th series Variety “C”, also in ‘C’ serial prefix variation, similar to our example above except in ‘C’ prefix designation. Reverse of these bars is same as Variety “A” above. Serial range span from C150000 – C299999. C154265
C174049
C202672
C215625
C229605
C250695
C254840
C294643
ICR Tier 5 - Small <150,000
MINTAGE
160252_145289_mphoto 2 Mid Hallmark [Serial Number]  [Custom ‘Gold Standard Corporation’ Hallmark in Elongated Octagon]  [999+]  [FINE SILVER]  [10 TR. OZ] Smooth Machined Finish Exclusive 10oz commercial bar produced for the Gold Standard Corporation.  Important to note that we have observed several in serial absent variation, also pictured. 508
5023
5534
5558
6001
6109
6254
6349
7249
7251
7253
9665
10013
ICR Tier 2 - Small <5,000
MINTAGE
10oz-Extrude-000518-Obverse-2  Octagonal E-Insert [Hallmark in Octagon]  [10 OZ]  [999. FINE]  [Serial Number]   Flat Extruded Finish  Extruded 10oz industrial bar.  Example -000373 old for $1,302.56 on November 3, 2016 via eBay auction.  Additional information may be found at this LINK. -000373
-000510
-000518
ICR Tier 1 - Small <50
MINTAGE
Screen Shot 2016-08-18 at 10.43.16 AMTop Hallmark[Serial Number][Hallmark in Elongated Octagon]  [999 FINE]  [10 OZ]Extruded 10oz bar in less frequently seen full-hallmark variation.  Interesting to note the reversal of obverse and reverse on this variety. -000874
-000876
ICR Tier 1 - Small<25
MINTAGE
unnamed-2 Octagonal E-Insert[10 OZ]  [Hallmark in Octagon]  [999. FINE][Serial Number]  [PIM Counterstamp] Extruded 10oz industrial bar with PIM counterstamp, one known example.-000025ICR Tier 1 - Small<10
MINTAGE


Landscape Varieties [Australian]:
EXAMPLEHALLMARKOBVERSEREVERSECOMMENTARYSAMPLE
SERIAL
NUMBERS
ICR | MINTAGE
IMG_9620Top Hallmark[Australian Engelhard Hallmark]  [999+SILVER]  [10OZ]Cast Finish10oz ingot in Australian variation, produced at the Engelhard refinery in Thomastown, Australia.  One known example.  Thanks to danman49 for this discovery!N/AICR Tier 1 - Small<50
MINTAGE 

Landscape Varieties [Canadian]:

Our study of Canadian 10oz weight class pieces included several hundred examples and was conclusive enough to justify the presentation of five [5] series of ingots and three [3] series of commercial bars.  Our commentary column includes general information observed on the majority of pieces studied.  However, it is important to note that there were exceptions found during our studies.  For example, an ingot may occasionally  include a serial font specific to the United States whereas the majority of other pieces within the same series demonstrate a Canadian serial font.  

We do not believe that serial number assignment is necessarily indicative of production order and that there were some variations in prefix assignment across all series.  Please also note that we have occasionally observed casting mould variation on Canadian produced ingots and it is not a terribly uncommon characteristic.  

We are confident that the 2nd and 4th series ingots were produced simultaneously and stamped with two different hallmark and stamp set placements.  The serial numbers observed across these two series of ingots are interspersed and are indicative of simultaneous production for both variety at the same production facility.  We do, however, believe that the differences observed on these two series are significant enough to warrant the assignment of separation.

EXAMPLE HALLMARK OBVERSE REVERSE COMMENTARY SAMPLE
SERIAL
NUMBERS
ICR | MINTAGE
photo 1-16 copyphoto 1-7 copyimage1 copy

Mid Hallmark [10.000]  [999+]  [Bull Hallmark in Elongated Octagon]  [Serial Number] Cast Finish 1st series ingot in Canadian variation.  The placement of this ingot’s weight/purity stampings and casting dimension are familiar to its 2nd series United States counterpart.  Canadian ingots across all weight class are typically observed in 6-digit serial format with purity stamping on left and weight class on right.  The initial run of this variety was in a rare 5-digit serial assignment.  Based on this ingot’s dimension, we speculate Canada was initially provided with casting moulds used by the United States at that time for this 1st series of Canadian ingots.  Interesting to note the serial font on these ingots are exclusive to this variety, specifically the ‘1’ and ‘3’ numbers. 85837
88831
90923
103186
ICR Tier 2 - Small <2,500
MINTAGE
FullSizeRenderMid Hallmark[999+]  [10.000]  [Bull Hallmark in Elongated Octagon]  [Serial Number]Cast Finish1st series ingot in Canadian variation.  Similar to our 1st series example, above, but demonstrates exceedingly rare reverse placement of purity and weight class stamping anomaly.  This ingot features the same font, casting mould dimensions and serial number assignment range as its other 1st series ingot counterparts.  Our appreciation to Dan S. for this astute discovery.93188ICR Tier 1 - Small<25
MINTAGE
Screen Shot 2017-05-19 at 8.32.22 AMEngelhard_10Oz_WideThreeZerosBullObvSmall Mid Hallmark [10.000]  [999+]  [Bull Hallmark in Elongated Octagon]  [Serial Number] Cast Finish

2nd series ingot in Canadian variation.  This ingot shares the same casting mould as our 1st series ingot, above. Note the reverse placement of weight and purity stampings, with 10.000 on left and 999+ to right.

103065
103092
103527
ICR Tier 1 - Small<500
MINTAGE
Screen Shot 2017-08-17 at 8.34.28 AMMid Hallmark[999+]  [10.000]  [Bull Hallmark in Elongated Octagon]  [Serial Number]Cast Finish

3rd series ingot in Canadian variation.  This ingot appears to share the same casting moulds as the 1st and 2nd series ingots, defined above.  The number ‘1’ serial font is exclusive to this variety of 10oz Canadian ingots in that it demonstrates a slightly angled top bar and a full horizontal bottom bar.  The  range of 108xxx to 110xxx serial numbers was back-filled to an available earlier run, though placement of weight and purity stampings are of new format.  Our appreciation to Dan S. for this discovery!

108391
108746
109216
110197
110582
180138
ICR Tier 2 - Small<2000
MINTAGE
photo-60 copy Mid Hallmark [999+]  [10.000]  [Bull Hallmark in Elongated Octagon]  [Serial Number] Cast Finish 3rd series 10oz ingot in Canadian variation, most commonly produced series and observed with several series-specific anomalies.  We believe theses ingots were produced using a Canadian casting mould and are occasionally seen with patterned ‘waffle’ or ‘heavy grid’ reverse, pictured below.  Note also that both United States and Canadian serial number fonts are commonly observed throughout serial number range.  Slight differences in purity and weight class stamp placements will be noted between some examples.
133616
154022
189883
192183
195660
197863
203697
220969
229584
244590
249872
257751
261101
267266
268166
280417
280597
ICR Tier 4 - Small <50,000
MINTAGE
DSC02501 Mid Hallmark [999+]  [10.000]  [Bull Hallmark in Elongated Octagon]  [Serial Number] Patterned Cast Finish 3rd series 10oz ingot in Canadian variation.  These examples demonstrate a ‘waffle’ pattern on the edges and reverse.
195659
ICR Tier 1 - Small <500
MINTAGE


[Included in
<50,000
2nd series
estimate,
above]
IMG_5501Mid Hallmark[999+]  [10.000]  [Bull Hallmark in Elongated Octagon]  [Serial Number]Patterned Cast Finish3rd series 10oz ingot in Canadian variation.  These examples demonstrate a unique ‘waffle’ pattern on the edges and reverse.
195118
ICR Tier 1 - Small<250
MINTAGE
IMG_5909IMG_5910 Mid Hallmark [999+]  [10.000]  [Bull Hallmark in Elongated Octagon]  [Serial Number] Heavy Grid  Cast Finish 3rd series 10oz ingot in Canadian variation.  These examples demonstrate a ‘heavy grid’ pattern reverse.  Ingot 197863 sold privately for $600.00 on January 1, 2017. 197635
197863
200740
ICR Tier 2 - Small <1,000
MINTAGE
 
[Included in
<50,000
2nd series
estimate,
above]
img_7884Mid Hallmark[999+]  [10.000]  [Bull Hallmark in Elongated Octagon]  [Serial Number]Cast Finish3rd series 10oz ingot in Canadian variation.  These examples demonstrate a ‘1•’ serial prefix anomaly, observed under samples in the next column.  1•203098
1•203136
ICR Tier 1 - Small<50
MINTAGE

[Included in
<50,000
2nd series
estimate,
above]
$_57-1 Mid Hallmark [999+]  [10.000]  [Bull Hallmark in Elongated Octagon]  [Serial Number] Cast Finish 3rd series 10oz ingot in Canadian variation.  These examples demonstrate a ‘I.’ serial prefix anomaly, observed under samples in the next column.  Ingot l.203291 sold privately on March 15, 2017 for $2,500.00.
I.203161
I.203232
I.203301
I.203490
I.232202
I.232251
I.232253
I.232285
I.232472
ICR Tier 1 - Small <200
MINTAGE

[Included in
<50,000
2nd series
estimate,
above]
Screen Shot 2017-03-20 at 3.39.24 PMScreen Shot 2017-03-20 at 3.36.56 PM copy 2 Mid Hallmark [999+]  [10.000]  [Bull Hallmark in Elongated Octagon]  [Serial Number] Cast Finish 3rd series 10oz ingot in Canadian variation.  These examples demonstrate a ‘-1′ serial suffix anomaly, observed under samples in the next column.  Ingot 247190-1 sold privately on March 15, 2017 for $2,200.00. 246984-1
246988-1
247002-1
247144-1
247190-1
247191-1
247202-1
247251-1
ICR Tier 1 - Small <250
MINTAGE

[Included in
<50,000
2nd series
estimate,
above]
fullsizerenderphoto-57 copy Mid Hallmark  [999+]  [10•000]  [Bull Hallmark in Elongated Octagon]  [Serial Number] Cast Finish 4th series ingot in Canadian variation.  Canada-specific casting mould and first variety to include ‘floating decimal’ on weight class as well as new font for purity 9′s common to Canadian production.  This series also includes a new hallmark with larger letters within elongated octagon and a smaller center ‘dot’ on the Bull Logo.  Although most examples studied demonstrated Canadian serial number font with occasional United States serial font variation, we believe this series ingot to be the first truly ‘All Canadian’ 10oz variety. These ingots are typically seen with the purity stamp directly above the ‘Bull Logo’ and the weight stamp further to the right.  Known examples include 172xxx and 188xxx serial range.  172621
188045
188083
188170
ICR Tier 2 - Small <2,000
MINTAGE
photo-65 copy
photo-59 copy
IMG_1349 copy
 Mid Hallmark  [999+]  [10•000]  [Bull Hallmark in Elongated Octagon]  [Serial Number]  Cast Finish 5th series ingot in Canadian variation.  Similar to 4th series above except wider casting mould was used.  Most examples studied demonstrate Canadian serial number font although there were occasional United States serial font variations.  These ingots are typically seen with the purity stamp directly above the ‘Bull Logo’ and the weight stamp further to the right. 121244
169914
173228
186751
191744
194795
195002
204308
ICR Tier 2 - Small  <5,000
MINTAGE
screen-shot-2017-01-02-at-11-16-36-amMid Hallmark[999+] [10•000] [Bull Hallmark in Elongated Octagon] [Serial Number]Pattern Cast Finish5th series 10oz ingot in Canadian variation. These examples demonstrate a ‘waffle’ pattern on the edges and reverse.  Ingot 195002 sold privately on March 10, 2017 for $1,200.00.194866
195002

195091
ICR Tier 1 - Small<100
MINTAGE

[Included in
<50,000
2nd series
estimate,
above]
IMG_0282 copyMid Hallmark[999+] [10•000] [Bull Hallmark in Elongated Octagon] [Serial Number]Heavy Grid  Cast Finish5th series 10oz ingot in Canadian variation.  These examples demonstrate a ‘heavy grid’ pattern reverse.200903
200905
ICR Tier 1 - Small<50
MINTAGE

[Included in
<5,000
4th series
estimate,
above]
img_7885
screen-shot-2016-11-28-at-2-45-05-pm
Mid Hallmark[999+]  [10•000]  [Bull Hallmark in Elongated Octagon]  [Serial Number]Cast Finish5th series 10oz ingot in Canadian variation in ‘1•’ serial prefix anomaly.1•203062
1•203301
ICR Tier 1 - Small<50
MINTAGE

[Included in
<5,000
4th series
estimate,
above]
IMG_5918 Mid Hallmark [999+]  [10•000]  [Bull Hallmark in Elongated Octagon]  [Serial Number] Cast Finish 5th series 10oz ingot in Canadian variation, similar to our example above except for ‘2’ serial prefix anomaly.  Ingot 2 134325 sold privately on February 20, 2017 for $2,450.00.  Two known examples. 2 133686
2 134325
ICR Tier 1 - Small <50
MINTAGE
 
[Included in
<5,000
4th series
estimate,
above]
$_57 Mid Hallmark [999+]  [10•000]  [Bull Hallmark in Elongated Octagon]  [Serial Number] Cast Finish 5th series 10oz ingot in Canadian variation.  This serial number prefix matches the 27xxxx format of 1st series commercial bars, directly below, likely of the very last 5th series ingots produced.  The letter ‘A’ prefix was added to differentiate and possibly eliminate a duplicate serial number of an actual 1st series commercial bar. Ingot A270012 sold privately on February 20, 2017 for $2,200.00. A 270012
A 270038
A 270088
ICR Tier 1 - Small <100
MINTAGE
 
[Included in
<5,000
4th series
estimate,
above]
Engelhard_10Oz_EarlyBullLogoStampedObvSmall  Mid Hallmark  [999+]  [10.000]  [Bull Hallmark in Elongated Octagon]  [Serial Number]     Smooth Machined Finish 1st series 10oz example in Canadian commercial bar variation.  A keen eye will observe a dot in the center of the bull logo.  The 2nd series, below, does not. 269505
269971
270775
272474
275254
275303
275454
275803
ICR Tier 2 - Small<5,000
MINTAGE
Engelhard_10Oz_6DigitBullLogoStampedObvSmall Mid Hallmark [999+]  [10.000]  [Bull Hallmark in Elongated Octagon]  [Serial Number]  Smooth Machined Finish  2nd series 10oz example in Canadian commercial bar variation, similar to our 1st series above except there exists a wider spacing between weight decimal and following zero, also the bull logo carries a different angle and lacks the center dot.  Our archives indicate that some examples were used for engraving, one having been engraved for an event in 1984, suggesting production period. 282051
284795
285830
286603
305305
306965
309495
327292
327950
ICR Tier 2 - Small<5,000
MINTAGE
Screen-Shot-2013-11-25-at-3.29.40-PM Mid Hallmark [FINE SILVER]  [999]  [Bull Hallmark in Elongated Octagon]  [10 TROY OUNCE]  [Serial Number] Smooth Machined Finish 3rd series 10oz example in Canadian variation. 328866
328872
328904
328928
ICR Tier 1 - Small <100
MINTAGE

  Serial Number Reference:
Prefix Name
  No Prefix
  4-Digit, Landscape Variety, Top Hallmark, 10.000, Poured Ingot
  5-Digit, Landscape Variety, Top Hallmark, 10.000, Poured Ingot
  5-Digit, Landscape Variety, Mid Hallmark, 10.ooo [Small Trailing Zeros], Poured Ingot
  4-Digit, Landscape Variety, Mid Hallmark, 10.000, Poured Ingot
  5-Digit, Landscape Variety, Mid Hallmark, 10.000, Poured Ingot
  5-Digit, Landscape Variety, Mid Hallmark, 10.000, MFR Variation, Poured Ingot
  6-Digit, Landscape Variety, Mid Hallmark, 10.000, Occasional ‘^’ Anomaly, Poured Ingot
  7-Digit, Landscape Variety, Mid Hallmark, 10 T.OZ Variety, Poured Ingot
  3-Digit, Landscape Variety, Gold Standard Corporation Hallmark, Machined Bar
  4-Digit, Landscape Variety, Gold Standard Corporation Hallmark, Machined Bar
  5-Digit, Portrait Variety, Liberty Trade Hallmark, Machined Bar
  6-Digit, Portrait Variety, Maple Leaf Hallmark, Machined Bar
  NOTE: Variations exist within the above classes based on stamp set spacing.
  P
  6-Digit, Landscape Variety, Mid Hallmark, Early ’99 9′ Design, Poured Ingot
  6-Digit, Landscape Variety, Mid Hallmark, Poured Ingot
  6-Digit, Portrait Variety, Large ‘E’ Logo, Machined Bar
  6-Digit, Landscape Variety, Top Hallmark, Machined Bar
  W
  6-Digit, Landscape Variety, Mid Hallmark, Poured Ingot
  C
  6-Digit, Portrait Variety, Large ‘E’ Logo, Machined Bar
  6-Digit, Portrait Variety, Eagle/Flag Logo, Machined Bar
  6-Digit, Landscape Variety, Top Hallmark, Machined Bar
  Canadian Variation
  No Prefix
  5-Digit, Landscape Variety, Bull Hallmark, Series 1, Poured Ingot
  6-Digit, Landscape Variety, Bull Hallmark, Series 1, Poured Ingot
  6-Digit, Landscape Variety, Bull Hallmark, Series 2, Poured Ingot
  6-Digit, Landscape Variety, Bull Hallmark, Series 3, Poured Ingot
  6-Digit, Landscape Variety, Bull Hallmark, Series 4, Poured Ingot
  6-Digit, Landscape Variety, Bull Hallmark, Series 1, Machined Bar
  6-Digit, Landscape Variety, Bull Hallmark, Series 2, Machined Bar
  6-Digit, Landscape Variety, Bull Hallmark, Series 3, Machined Bar
  NOTE: Variations exist within the above classes based on reverse finish anomalies and serial number ‘1.’ prefix and ‘-1′ suffix variations.

  • Most Engelhard 10oz class silver bars have serial numbers.
  • Our archives indicate that the 6-digit Canadian variety serial number did not exceed 330000 [with several minor variations].  They began with poured examples and were followed by machined examples.  It is possible that, in some cases, two variety were produced simultaneously.
  • Our archives indicate that P series likely preceded W series, both of which preceded the final production C series variety.  In the case of 10oz examples, only three letters of P, W and C were used and in that order.
  • There may be duplicate serial numbers [but not of the same design] due to the Eagle/Flag logo production ‘rolling over’.
  • There are unsubstantiated claims that ‘P’ represents ‘poured’ and ‘C’ represents ‘cast’ in serial prefix.  We challenge this theory, as it was the casting method by which Engelhard produced their poured ingots.  Casting is quite similar to making ice cubes in a freezer, in that liquid [molten metal] is used to create a solid ingot by use of a mould.  As such, the terms ‘poured’ and ‘cast’ are synonymous.  Further, Engelhard could not have designated a ‘P’ prefix in anticipation of the ‘C’ prefix series as advancement of their production technology was likely not foreseeable when they designated the ‘P’ prefix.  There are also claims that ‘W’ represents ‘wide’ series, which is doubtful because the majority of 10oz pieces were produced in wide [landscape] variety.  We speculate, at this time, that ‘W’ is representative of the Engelhard ‘West’ Facility at which they were produced and that ‘P’ and ‘C’ were likely arbitrarily designated.
Screen Shot 2014-06-27 at 1.33.41 PM