United States Naval Special Warfare. Condition: Used, and in good shape. Acquired many older challenge coins from a Vietnam river rat who got most of them from what he called the “bat cave” in Cornado–whatever that means? 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 SEAL Team 3 Silver toned Navy Challenge Coin / Three” is in sale since Sunday, January 04, 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.