Navy chief cpo non nypd coin. The item “Challenge coin navy chief cpo seal frogman hinged double coin” is in sale since Wednesday, June 27, 2018. This item is in the category “Collectibles\Militaria\Current Militaria (2001-Now)\Original Items\Challenge Coins”. The seller is “flightdoc89″ and is located in FPO, Armed Forces Pacific. This item can be shipped to United States.