1955 U. S. Mint Silver Proof Set Sealed Box 18 February 2024February 18, 2024adminmintmint, proof, sealed, silver Mint Silver Proof Set – Sealed Box. Item in photos is the actual item you will receive, except when “STOCK PHOTOS” is noted above. We use Flat Rate mailing supplies as much as possible. Coins removed from their packaging are non returnable.