No explanation needed, super popular charge book CPO coin! This US NAVY SPAWAR San Diego Charge Book CPO Chief Coin 2 Piece is a valuable addition to any militaria collection. The coin features the original design and is an authentic item. The theme of the coin is militaria, making it a perfect gift or addition to any collection. The coin is categorized under collectibles and militaria, specifically under original items and challenge coins. It is a rare and unique item that will make a great addition to any collection. Add this piece to your collection today!