1955 UN-OPENED BOX - SILVER PROOF SET. If the listing does not say "or best offer", then don't. Check your SPAM filters for invoices and/or tracking numbers from me as they occasionally get blocked. This is one 1955 box proof set that has never been opened since it left the mint. 1955 UN-OPENED boxed sets are getting harder to locate every day.Only you will know, if you choose to open it! The 1955 box proof sets were stamped by the mint with blue ink. Sometimes one or two letters are off the edge of the box. There are 5 coins in each box. Lincoln cent, Jefferson nickel, Roosevelt dime, Washington quarter and Franklin half dollar. The Dime, Quarter and Half are 90% Silver composition. 378,200 sets were issued total of both flat pack and box sets. No figures on how many of each were minted. The set you will receive is similar to the photos. My responsibility ends when the package is delivered and or signed for. Otherwise, the below policies prevail. Powered by SixBit's eCommerce Solution. The item "1955 UN-OPENED BOX SILVER PROOF SET" is in sale since Tuesday, January 1, 2019. This item is in the category "Coins & Paper Money\Coins\ US\Proof Sets". The seller is "neon65" and is located in Loxahatchee, Florida. This item can be shipped to United States.