X

AG | 20oz | 25oz

ALL ENGELHARD is pleased to welcome visitors to our Johnson Matthey 20oz and 25oz Definitive Page. While our focus is clearly Engelhard, we recognize that many Engelhard bullion collectors also collect Johnson Matthey bars and ingots. As such, we appreciate the opportunity to present important bullion information on the world’s second most collectible refiner, Johnson Matthey. We hope you welcome this new addition, and we look forward to your thoughts and input!

Our Definitives, below, are organized region of origin. Also note that our Definitives reflect what we believe to be the earliest examples first, followed by more recent production examples.

IMAGE WEIGHT
CLASS
OBVERSE REVERSE COMMENTARY SAMPLE
SERIAL
NUMBERS
ESTIMATED
MINTAGE
20 OZ JM20oz[Diamond JM Logo with Crossed Hammers] [20 OZ] [Serial Number] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval]Cast Finish20oz example produced by Johnson Matthey, Canada.02136F
02362F
02543F
02925F
02926F
03047F
03060F
03076F
<1,000
unnamed20oz[Diamond JM Logo with Crossed Hammers] [20+ OZ] [Serial Number] [999+] [Number 8 Below Serial Number] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval]Cast Finish20oz example produced by Johnson Matthey, Canada.  Includes unique Number 8 stamp, similar to it’s 50+oz counterpart listed on the 5oz Johnson Matthey definitive page.1120
1329
<100
20oz JM SERIAL RIGHT Small Diamond20oz[Diamond JM Logo with Crossed Hammers] [20 OZ] [Serial Number Sideways on Right] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval]Cast Finish20oz example produced by Johnson Matthey, Canada.F003629
F006340
<2,500
unnamed-120oz[Diamond JM Logo with Crossed Hammers] [20 OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval]Cast Finish20oz example produced by Johnson Matthey, Canada.Serial Absent<500
JM 20oz 20oz [JOHNSON MATTHEY] [Diamond JM Logo with Crossed Hammers] [Serial Number Sideways on Left] [20 OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] Cast Finish
20oz example produced by Johnson Matthey, Canada.  Interesting to note that example F006352 demonstrated reverse stamp impression anomaly on the ingot’s reverse, pictured below.
unnamed
F002719
F003752
F004218
F005269
F006352
F007052
F008096
<10,000
JM_20Oz_TDBankObv20oz[TD Bank Logo] [Serial Number Sideways on Left] [20 OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval]Cast Finish20oz example produced by Johnson Matthey, Canada, for TD Bank.
F008196
F008534
<1,000
unnamed20oz[Diamond JM Logo with Crossed Hammers] [20 OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval]Cast Finish20oz example produced by Johnson Matthey, Canada. Serial absent variation.Serial Absent<500
unnamed20oz[Diamond JM Logo with Crossed Hammers] [20 OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval]Pressed Finish20oz example produced by Johnson Matthey, Canada.  Unique example in that the stampings have been applied to the flat reverse side.Serial Absent<500
20oz JM 500 mintage  New   1 copy20oz[Diamond JM Logo with Crossed Hammers] [20 OZ] [CANADA Inner Oval] [JM LTD. ASSAY OFFICE Oval Logo] [999+]Cast Finish20oz example produced by Johnson Matthey, Canada. Serial absent variation.  Note the opposite placement of purity and assay stampings as opposed to our bar, above.Serial Absent<500
unnamed-120oz[Diamond JM Logo with Crossed Hammers] [20 OZ.TR] [CANADA Inner Oval] [JM LTD. ASSAY OFFICE Oval Logo] [999+]Cast Finish20oz example produced by Johnson Matthey, Canada. Serial absent variation and OZ.TR weight suffix.Serial Absent<500
image20oz[Diamond JM Logo with Crossed Hammers] [20 OZ.TR] [999+] [CANADA Inner Oval] [JM LTD. ASSAY OFFICE Oval Logo]Cast Finish20oz example produced by Johnson Matthey, Canada. Similar to our above example but demonstrates reverse placement of purity and oval logo.Serial Absent<250
unnamed20oz[JOHNSON MATTHEY & MALLORY Oval Logo] [CANADA Inner Oval] [20 OZ.TR] [999] [J M & M LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval]Cast Finish20oz example produced by Johnson Matthey & Mallory, Canada.  Unique placement of weight class designation and purity stamp lacks the ‘+’ on 999 fineness.  One known example.Serial Absent<100
unnamed-520oz[JOHNSON MATTHEY & MALLORY Oval Logo] [CANADA Inner Oval] [J M & M LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] [20 OZ.TR]Cast Finish20oz example produced by Johnson Matthey & Mallory, Canada.Serial Absent<500
JM_20Oz_PouredNoSerialObv 20oz [JOHNSON MATTHEY & MALLORY Oval Logo] [CANADA Inner Oval] [Maple Leaf Logo] [J M & M LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] [20 OZ.TR] Cast Finish
20oz example produced by Johnson Matthey & Mallory, Canada.  Similar to our above example but demonstrates a different oval hallmark and includes the Maple Leaf logo. Serial Absent <200
unnamed20oz[JOHNSON MATTHEY & MALLORY Oval Logo] [CANADA Inner Oval] [J M & M LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+] [20 OZ.TR]Cast FinishSimilar to our above example but does not include the Maple Leaf logo.  One known example.Serial Absent<100
unnamed20oz[JOHNSON MATTHEY & MALLORY Oval Logo] [CANADA Inner Oval] [Maple Leaf Logo] [999+] [20 OZ.TR]Cast Finish20oz example produced by Johnson Matthey & Mallory, Canada.  Similar to our above examples but lacks both the oval JM&M hallmark and the Maple Leaf logo.  One known example.Serial Absent<25
unnamed-320oz[JMC Rectangular Logo] [999+] [20oz.TR]Cast Finish20oz example produced by Johnson Matthey & Mallory, Canada.Serial Absent<500
JM 20oz LONDON20oz[JOHNSON MATTHEY LONDON Oval Logo] [REFINERS MELTERS Inner Oval] [999] [20 OZS]
Cast Finish20oz example produced by Johnson Matthey London.Serial Absent<500
unnamed-225oz[Diamond JM Logo with Crossed Hammers] [25 OZ] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] [999+]Cast Finish25oz example produced by Johnson Matthey, Canada.  Large weight class designation font, earliest known variety.Serial Absent<100
JM_25Oz_StandardObv 25oz [Diamond JM Logo with Crossed Hammers] [25 OZ] [Serial Number] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval] Cast Finish
25oz example produced by Johnson Matthey, Canada. 20017E <1,000
JM 25oz25ozDiamond JM Logo with Crossed Hammers] [25 OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval]Cast Finish25oz example produced by Johnson Matthey, Canada. Serial absent variation of our example above.
Serial Absent<500
unnamed-225ozDiamond JM Logo with Crossed Hammers] [25 OZ] [999+] [JM LTD. ASSAY OFFICE Oval Logo] [CANADA Inner Oval]Cast Finish25oz example produced by Johnson Matthey, Canada. Serial absent variation of our example above with font anomaly on weight stamp.  Notice the smaller ‘5’ in the ’25oz’ weight class designation.Serial Absent<100