Franklin Mint 1971 Proof Set of 50 bank marked Sterling Silver Ingots. Complete 50 piece set of Franklin Mint's 1972 issue of Bankmarked Sterling Silver Ingots.There are 480 grains in a troy ounce, so each 1000 grain sterling silver ingot contains 1.92 troy ounces of pure silver. Please see pictures for condition. The item "Franklin Mint 1971 Proof Set of 50 bank marked Sterling Silver Ingots" is in sale since Tuesday, July 17, 2018. This item is in the category "Coins & Paper Money\Bullion\Silver\Bars & Rounds". The seller is "americanrarecoin" and is located in Seattle, Washington. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, Indonesia, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Colombia.