Warriors From The Sea. Challenge Coin / Bottle Opener. This coin is approximately 1 1/2 inches wide by 3 inches high. This is coin is a beauty! (SDV) and a Dry Deck Shelter. The normal table of organization includes three task units and a headquarters element. Each SDV Task Unit operates independently from a host submarine in the conduct of Naval Special Warfare missions. SDVT-1 conducts operations throughout the Pacific. Command’s and Central. Command’s geographic areas of responsibility. Never personally given any of the coins. All coins are guaranteed to be in excellent condition unless otherwise specified above. The free listing tool. This item is in the category “Collectibles\Militaria\Current Militaria (2001-Now)\Original Items\Challenge Coins”. The seller is “rolyat11″ and is located in this country: US. This item can be shipped worldwide.