Bristol Aero Engines Ltd 25 years service silver badge

A scarce original circa 1956 aircraft engine manufacturer 'Bristol Aero Engines Ltd twenty five years service silver badge'; the reverse impressed with Birmingham silver hallmarks for 1956 and maker's details 'F&S' (Fattorini & Sons). Very good condition, complete with original screw post fixing and silver nut with hallmark, enamel perfect. Width 29mm. Height 13mm.