The Navy Chief Petty Officer Challenge Coin CPOA E7 FY21 Winter Chief is an original collectible item representing the military theme of Militaria. This coin is a unique piece from the United States, making it a valuable addition to any collection for those interested in American military history and memorabilia. With its specific designation as a rare item for the Chief Petty Officer rank, this challenge coin holds special significance for collectors and military enthusiasts alike.