Rare Two Star Navy Seal Rear Admiral Flipper Coin. Commander naval special warfare command. The item “Rare Two Star Navy Seal Rear Admiral Flipper Coin” is in sale since Saturday, February 15, 2020. This item is in the category “Collectibles\Militaria\Current Militaria (2001-Now)\Original Items\Challenge Coins”. The seller is “donavapeterse-0″ and is located in Redding, California. This item can be shipped worldwide.