U.S. Air Force WWII sweetheart pin

Key Field vintage WWII sweetheart pin. sterling silver and enamel pin, make marked 'Amico' American insignia company. 'Key Field' over U.S.A. pin, with U.S. Airforce blue enamel round insignia, with chain attachment. Key Field airport is situated in Mississippi. postage included for U.K. only s/n 169