Mint Complete SILVER PROOF SET w/ OGP Box And COA – 14 Coins. Mint Complete Silver Proof Set includes 14 coins, each struck with a proof finish and composed of silver. This set is uncirculated and comes with an Original Government Packaging (OGP) box and Certificate of Authenticity (COA) from the U. This collection, originating from the United States, is a desirable option for coin collectors looking to add a complete set of silver proof coins to their collection from the year 2009. Please look at all photos for details. We will be happy to answer all questions before the item ends. Please view our other interesting items.