United States Navy Special Warfare. Condition: Used, and in good shape. The coin is 1 3/4 by 2 inches made of hard baked enamel. 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 Unit Two Serial #120 SEAL Teams Navy Challenge Coin / 2″ is in sale since Thursday, January 01, 2015. 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.