WW2 Royal Air Force pilot's wing silver RAF sweetheart brooch

A good original wartime period 'Royal Air Force sweetheart brooch', polshed 'RAF' crest on dark blue enamel ground, within a King George VI Crown laurel wreath, flanked by large feathered wings beautifully inlaid with sky blue enamelling, the reverse impressed 'Silver'. Very good condition, complete with original pin fittings, no enamel loss.Wingspan approx 54mm.