Vintage Sterling Silver Mechanical Charm - Single Prop Airplane

Maker: Unknown Item: A vintage 1950s Sterling Silver (hallmarked on the underside of the wing as pictured) mechanical (the propellor moves) charm in the shape of a single prop airplane. Extremely detailed. Size/Weight: 13/16" long x 3/4" wide; depth is about 5/16". Weight is 1.9 grams. Very fine condition with a mellow patina to the silver and no problems I can spot.