As the need for bodily silver surged in the 1970s, Johnson Matthey was, along with Engelhard, a significant producer of 100-oz silver bars. In the late 1970s, Johnson Matthey started creating struck 10 oz .999 silver bars, which JM turned out until finally the mid-eighties when desire waned. JM struck ten-oz silver bars ended up sealed in vinyl, and at times are nevertheless in their protecting vinyl coverings when they are sold into the secondary industry.10 oz silver bars for sale