United States Special Operations Commmand. Condition: Used, and in good shape. The coin is 1 5/8 by 2 inches with 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 “United States Special Operations Commmand Navy SEALs Chief’s Mess Challenge Coin” is in sale since Wednesday, October 21, 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.