United States Military Air Force Rings 1972. Look really good condition. Material : Gold 10k , Sapphire Stone. Size : 11 (US Size). The item “United States Military Air Force Rings 1972, Gold 10k, size 11″ is in sale since Friday, September 28, 2018. This item is in the category “Collectibles\Militaria\Vietnam (1961-75)\Original Period Items\Other Vietnam War Orig. Items”. The seller is “annamshop” and is located in Ho Chi Minh City. This item can be shipped worldwide.