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 “SEAL Team 7 Naval Special Warfare NSW Seven 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.