Very Rare Yokosuka Japan Navy Chief Challenge coin, CPO CFAY Security Tanuki. Very massive coin, 3.5×3.5. The item “Very Rare Yokosuka Japan Navy Chief Challenge coin, CPO CFAY Security Tanuki” is in sale since Wednesday, September 26, 2018. This item is in the category “Collectibles\Militaria\Current Militaria (2001-Now)\Original Items\Challenge Coins”. The seller is “bookolector11″ and is located in La Mesa, California. This item can be shipped to United States.