In fact, the manufacturing and sales of silver rounds, 1 ounce JM Silver Bars and, 10 ounce JM silver bars, and even 100 ounce silver bars became wide accepted among prospective investors. These silver bars are often referred as JM Silver bars, and still, Johnson Matthey uses the initials JM to differentiate Johnson Matthey issue products from other company’s products. From the 1970’s until 1980’s, Johnson Matthey Silver bars became famous.
