The leading 100 ounce bars are produced by Engelhard and Johnson-Matthey, the world's two largest refiners. However, tandme.co.uk these bars have not been massed produced within the late nineteen-eighties. More easily are the RCM (.9999 fineness), 제주오피 Academy (.999 fineness), Sunshine Minting (.999 fineness), or Ohio Precious Metals (.9995 fineness) brands....