Johnson Matthey

Johnson Matthey is a historic name in precious metals refining, established in London in the 19th century and long recognized for producing some of the most trusted bullion bars in the market. In 2015, Johnson Matthey sold its precious metals refining operations to Asahi Refining, ending new production under the JM hallmark. Existing Johnson Matthey silver bars and gold bars now trade exclusively on the secondary market, where they command strong recognition and steady demand.

Legacy products include 1 oz, 10 oz, kilo, and 100 oz silver bars in both poured and pressed styles, along with gold bars in comparable weights. The distinctive JM hallmark, serial numbers, and consistent fineness make these bars straightforward to authenticate and resell. Vintage poured bars — particularly the older logo variants and unusual sizes — carry collector premiums above melt. For investors, JM bars remain among the most liquid secondary-market products available.

https://www.asahirefining.com/