| IMAGE | WEIGHT
CLASS
| OBVERSE | REVERSE | COMMENTARY | SAMPLE
SERIAL
NUMBERS | ESTIMATED
MINTAGE |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [50 OZ] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Earliest known example with taller ’50’ weight class font and wide spacing between purity ‘9’ stampings, and does not include the 26mm ’50 OZ’ aligned weight class gang-stamp. | Serial
Absent | <250 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [50 OZ] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+]
| Cast Finish | 50oz example produced by Johnson Matthey, Canada. Early example with large weight class font and does not include the 26mm ’50 OZ’ aligned weight class gang-stamp.
| Serial
Absent | <250 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [50 OZ] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Similar to our above example, though includes the 26mm ’50 OZ’ aligned weight class gang-stamp. | Serial
Absent | <25 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [50 OZ] [Serial Number] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. This example includes the 26mm ’50 OZ’ aligned weight class gang-stamp. Note unique serial font and circular ‘overstrike’ impression left by die strike on ‘1’ of serial number – as opposed to typical square overstrikes on all other examples. | 1605 | <25 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [Number 8 Below Diamond Logo] [50 OZ] [Serial Number] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Similar to our example above in that it includes the 26mm ’50 OZ’ aligned weight class gang-stamp, but also demonstrates the unique Number 8 stamp. | 1275 | <10 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [Number 8 Below Diamond Logo] [50 OZ] [Serial Number] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Similar to our example above but demonstrates the unique Number 8 stamp and does not include the 26mm ’50 OZ’ aligned weight class gang-stamp. | 1027
1277 | <25 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [Number 8 Below Diamond Logo] [50 OZ] [Serial Number] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. This example is similar to our examples above, though includes a vertically placed serial number in three-digit variation. | 511
529 | <5 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [Number 8 Below Diamond Logo] [50 OZ] [Serial Number] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. This example is similar to our example directly above, though demonstrates a vertically placed serial number on the opposite side. | 908 | <5 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [Number 8 Below Diamond Logo] [50 OZ] [Serial Number] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. This example is similar to our example directly above, though includes the 26mm ’50 OZ’ aligned weight class gang-stamp. This error bar is of significance, as the serial number placement was originally attempted on the left side. The digit ‘3’ was properly applied, but the ‘9’ was sideways and the digit ‘6’ was inverted. The serial number was then properly applied at the middle of the obverse. | 396 | <5 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [50 OZ] [Serial Number] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. This example includes the 26mm ’50 OZ’ aligned weight class gang-stamp. Although our estimated mintage figures for this example may appear some what liberal, our historical observation is there has been quite limited market availability. | 15514 C
15817 C | <250 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [50 OZ] [Serial Number] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Similar to our example above but with traditional placement of purity and small oval hallmark, and includes the 26mm ’50 OZ’ aligned weight class gang-stamp. |
15195 X
15221 X
15464 X 15798 X 15899 X 15991 X 16309 X | <250 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [50 OZ] [Serial Number] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced in 1981 by Johnson Matthey, Canada. This example includes the 26mm ’50 OZ’ aligned weight class gang-stamp. Similar to our example above but with reverse placement of purity and small oval hallmark. The example depicted was issued with a Johnson Matthew Assay Certificate, pictured below. Our appreciation to Bob H. for this discovery!
 
| 15728 X | <10 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [Serial Number] [50 OZ] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Early example with large weight class font and serial number placement variation. This example does not include the 26mm ’50 OZ’ aligned weight class gang-stamp. This example also demonstrates a wider spacing on the ‘999+’ purity stamping at approximately 17.50mm. | 001143
001278
001415
| <25 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [Serial Number] [50 OZ] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Similar to our above example in that it does not include the 26mm ’50 OZ’ aligned weight class gang-stamp, but does demonstrate a narrower spacing on the ‘999+’ purity stamping at approximately 13.50mm. | 001265 | <25 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [Serial Number] [50 OZ] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Similar to our above examples, but includes the 26mm ’50 OZ’ aligned weight class gang-stamp. This example also demonstrates a wider spacing on the ‘999+’ purity stamping at approximately 17.50mm. | 001702 | <25 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [Serial Number] [50 OZ] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Similar to our above examples in that it does not include the 26mm ’50 OZ’ aligned weight class gang-stamp, but note the narrower and more oval shaped zero in ’50’ weight class stamp. Lastly, this example demonstrates the narrower spacing on the ‘999+’ purity stamping at approximately 13.50mm. | 001868 | <25 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [50 OZ] [Serial Number] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Similar to our example above but the purity spacing is more narrow. Note the round ‘zero’ in ’50 OZ’ weight designation as compared to later series. | 001640
001734 | <500 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [50 OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Smaller weight class font wither larger ‘0’ in the ’50oz’ stamping and unique casting mould. This ingot measures approximately 152.40mm x 57.15mm x 20.64 at the widest points, and demonstrates very small numerals and letters in the weight class with the ‘0’ slightly larger. Please note that the middle of this example is thicker and wider in the center than at either the top or bottom. Our thanks to Dan S. for this discovery!
| Serial
Absent | <25 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [50 OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Similar to our above example, though important to note the sharp rectangular casting mould vs. more rounded casting mould of our entry just above.
| Serial
Absent | <75 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [Number 8 Below Diamond Logo] [50 OZ] [Serial Number] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Similar to our above example, though includes a three digit serial number and the unique Number 8 stamp. Note the number ‘5’ overstamp on the ‘8’ error, enlarged below.
| 570 | <5 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [50+ OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Interesting 50 ‘+’ OZ weight class designation. | Serial
Absent | <50 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [50+ OZ] [Serial Number] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Interesting 50 ‘+’ OZ weight class designation. This example carries a serial number with ‘A’ suffix. | 14248 A | <25 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [50+ OZ] [Serial Number] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Interesting 50 ‘+’ OZ weight class designation. This example carries a serial number with ‘C’ suffix. | 14248 C
16042 C
16663 C
17704 C
17875 C
17884 C
17889 C | <3,000 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [Number 8 Directly Below Diamond Logo] [50+ OZ] [Serial Number Sideways on Left] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Includes serial number and interesting 50 ‘+’ OZ weight class designation. This example is similar to a 20oz weight class that also includes the Number 8 stamp. | 441 | <10 |
 | 50oz | [Diamond JM Logo with Crossed Hammers] [Number 8 Below Diamond Logo] [50+ OZ] [Serial Number] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Includes serial number and interesting 50 ‘+’ OZ weight class designation. This example is similar to our above entry, though with a horizontal serial number stamp in four digit. | 1280 | <10 |
 | 50oz | [JOHNSON MATTHEY] [Diamond JM Logo with Crossed Hammers] [Serial Number Sideways on Right] [50 OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. | C018385
C020553
C023403
| <5,000 |
 | 50oz | [JOHNSON MATTHEY] [Diamond JM Logo with Crossed Hammers] [Serial Number Sideways on Left] [50 OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] | Cast Finish
| 50oz example produced by Johnson Matthey, Canada. Example C023398 was issued with Johnson Matthey assay certificate, dated November 9, 1981, pictured below. Example C028750 was issued with Johnson Matthey assay certificate, dated May 26, 1982.
   | C021866
C023398
C023916
C025278
C027540
C028750
C036144
C040130
C045169
C047850
C048573 | <30,000 |
 | 50oz | [JOHNSON MATTHEY] [Diamond JM Logo with Crossed Hammers] [Serial Number Sideways on Left] [50 OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] | Cast Finish | 50oz example produced by Johnson Matthey, Canada. Similar to our above example, though includes an inverted ‘JM LTD. ASSAY OFFICE’ oval logo. | C023903 | <5 |
 | 50oz | [TD Bank Logo] [Serial Number Sideways on Right] [50 OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] | Cast Finish | 50oz example produced by Johnson Matthey, Canada, for TD Bank. | C036458 | <250 |
 | 50oz | [TD Bank Logo] [Serial Number Sideways on Right] [50 OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] | Cast Finish | 50oz example produced by Johnson Matthey, Canada, for TD Bank. Similar to our above example, though of a more narrow and tall casting mould as demonstrated in the photos below.  | M001474
M001583
M001949
M001956
M001966 | <500 |
 | 50oz | [JOHNSON MATTHEY LONDON Oval Logo] [REFINERS MELTERS Inner Oval] [999] [50 OZS] [SILVER] [Serial Number]
| Cast Finish | 50oz example produced by Johnson Matthey London. | JM70415A
JM70416A
JM70435A
JM70460A
JM70520A
JM70609A
JM70681A
JM70843A
JM70845A | <500 |
 | 50oz | [JOHNSON MATTHEY LONDON Oval Logo] [REFINERS MELTERS Inner Oval] [999] [MOCATTA & GOLDSMID LTD LONDON BULLION BROKERS] | Cast Finish | 50oz example produced by Johnson Matthey London. | Serial
Absent | <10 |
 | 50oz | [JMC Logo] [Northgate Exploration Custom Logo] [NORTHGATE EXPLORATION LTD.] [TYNAGH MINE] [IRELAND] [999+] [50•068] | Cast Finish | 50oz example produced by Johnson Matthey for Northgate Exploration, Ltc. This bar is also listed on our 50oz Definitive Page, as it is technically an odd sized example.
| Serial Absent | <100 |
