Johnson Matthey Silver Bars. The 100 oz johnson matthey silver bar is a premier offering of its weight class. At one time, johnson matthey operated one of the biggest precious metals refining groups in the world, with operations in the uk, us and canada.
Trusted gold dealer in amarillo. Some collectors are interested in beautifully crafted silver bars with toning, unique designs, and more. However, newer jm silver bars are more available on the precious metals market, since the majority of the older.