Mint Silver Proof Set 14 Coins with Box & COA. The item “2012 U. S. Mint Silver Proof Set 14 Coins with Box & COA” is in sale since Thursday, June 27, 2019. This item is in the category “Coins & Paper Money\Coins\ US\Proof Sets”. The seller is “2centsless” and is located in Brandon, Mississippi. […]