United States Navy USN USS Louisiana SSBN-743 challenge coin. The item “US Navy USS Louisiana SSBN-743 Challenge Coin Chief CPO Mess” is in sale since Monday, December 3, 2018. This item is in the category “Collectibles\Militaria\Current Militaria (2001-Now)\Original Items\Challenge Coins”. The seller is “punjab09″ and is located in Clovis, California. This item can be shipped to United States.