WWII Air Corps Flight Engineer Wings. This is a very well made museum quality reproduction in Sterling Silver of the Denmark designed wing with lots of detail and a pin back in the standard 3 inch size. These wings were authorized on June 19, 1945. The last wing of World War II was authorized for the flight engineers in USAAF. After the war this wing continued to be used for Flight Engineers on the B-29 and some other aircraft. 3 inch wing.