Gettysburg Commemorative 5 Ounce Silver Coin Collector’s Piece From The U.S. Mint. The Gettysburg Museum of History has a few of these U.S. mint Gettysburg Silver pieces. They look like the Gettysburg quarters but are huge in size and weigh a full 5 (five) ounces of .999 pure bullion silver. These are sold out at the mint and were very limited. Issued in 2011. They are un-circulated but some might have a trace of storage wear or tarnish. A great investment item. A great and unique gift item. Museum Certification (COA) included. Very limited supply.