Naval Special Warfare Group. SEAL Teams / UDTs. Condition: New Old Stock. May have some patina from age. The coin is 1 5/8 inches in diameter with hard baked enamel. Very early Navy SEAL challenge coin–from my understanding this coin was specially made in a limited number and awarded to SEAL warriors in the mid-80s as per written correspondence with me. This coin was acquired in a large collection of military surplus items. Elite Military Coins (EMC85). 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 “NAVSPECWARGRU SEAL Teams Grenada 1985 Navy Challenge Coin / UDTs BUDs SERE CLR” is in sale since Wednesday, November 8, 2017. This item is in the category “Collectibles\Militaria\1976-89\Original Period Items”. The seller is “rolyat11″ and is located in Panama City, Florida. This item can be shipped worldwide.