Click to expand Tap to zoom 1981 US Mint Proof Set 6 Gem Coins in Original Mint Plastic - NO Sleeve $11.55 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart 1981-S U.S. Mint Proof Set. Six Gem Coins (Cent through Dollar) in Original Mint Packaging.