The wing is 2 inches long, and has STERLING and ACID TEST incised on the reverse. It is very unusual to see both words on the reverse at the same time. The wing has a nice aged tone to it, has not been cleaned, and you will not find a finer example. The item "WWII US ARMY AIR FORCE AAF Flight Nurse Wing" is in sale since Wednesday, May 22, 2019. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\United States\Pins".The seller is "lbiman" and is located in Trenton, New Jersey. This item can be shipped worldwide.