AUTHENTIC Military Challenge Coin. Bought a few large personal collections and will be listing them over the next few days. NO REASONABLE OFFERS DECLINED. The item “Naval Special Warfare Center DET Great Lakes SEALS SWCC EOD Navy Challenge Coin” is in sale since Wednesday, November 22, 2017. This item is in the category “Collectibles\Militaria\Current Militaria (2001-Now)\Original Items\Challenge Coins”. The seller is “challengecointrader” and is located in Cameron, North Carolina. This item can be shipped to United States.