United Naval Special Warfare. Condition: Used, and in good shape. The coin is 2 inches in diameter. 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 7 Navy Challenge Coin / Seven” is in sale since Sunday, May 21, 2017. 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.