Naval Special Warfare Unit Three. Condition : Used, and in good shape. This coin is 2 1/2 x 1 1/4 inches. Was once a rare coin, but it appears there has been a re-strike of this original unit coin. Never personally given any of the coins. All coins are guaranteed to be in excellent condition unless otherwise specified above. The free listing tool. The item “Naval Special Warfare Unit Three Tip of Spear SEAL Navy Challenge Coin” is in sale since Tuesday, May 23, 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.