United States Naval Special Warfare. Condition: Used, and in fair shape. But to me looks like the crack look is under the enamel. The coin is 2 3/8 inches wide by 3 inches high. NOTE: Never personally given any of the coins. All coins are guaranteed to be in excellent condition unless specified above. The free listing tool. The item “Naval Special Warfare SEAL Team One, 50th Annv ser#316 Navy Challenge Coin / 1″ is in sale since Sunday, March 11, 2018. This item is in the category “Collectibles\Militaria\Current Militaria (2001-Now)\Original Items\Challenge Coins”. The seller is “rolyat11″ and is located in Panama City, Florida. This item can be shipped worldwide.