Get your limited edition copy of this Shellback coin .A Shell Back is a sailor who crosses the equator. There are many Shall Back challenge coins on the internet for sale, but none like this. This rare coin will never be minted the same way again. It's full 3D tri - plated black nickel, shiny gold, and shiny silver. The degree of difficulty in producing this coin is extreme. Only our exclusive factory will produce this coin. Only 100 coins were minted and they will not be minted in tri - plating again. This coin is a 2" coin and 3.5mm thick. THIS IS ONE INCREDIBLE COIN, Only 17 of these now left. Once they are gone, they will not be minted again in tri - plating.