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Here are some of the recognized Johnson Matthey Logo

Modern

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Photo credit companieslogo.com

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Crossed Hammer

Photo credit freebiesupply.com

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London Refinery

fbig_silver_johnson_matthey_london_italiana_idmark2.jpg

London Refinery

fbig_silver_johnson_matthey_london_9990_idmark.jpg

London Refinery

fbig_silver_jm_saltlakecity_idmark.jpg
fbig_gold_johnson_matthey_slc_saltlakecity_oval_idmark.jpg

Salt Lake City

Photo credit free-bullion-investment-guide.com

fbig_silver_johnson_matthey_mallory.jpg
fbig_silver_jm_and_m_oval_idmark.jpg

Johnson Matthey & Mallory

Photo credit JH 

Early certification marks use sometime between 1955 and 1958 until 1963.

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Johnson Matthey & Company

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fbig_gold_johnson_matthey_pauwels_oval_idmark.jpg
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BRUSSEL & PAUWELS

Photo credit free-bullion-investment-guide.com

Johnson Matthey Limited

Photo credit free-bullion-investment-guide.com

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fbig_silver_johnson_matthey_london_id_mark.jpg
fbig_silver_johnson_matthey_london_9990_idmark.jpg

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Early London certification marks dating 1933.

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Johnson Matthey London

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Johnson Matthey Australia

Johnson Matthey Canada (JMC)

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