St John Ambulance Association Southern Railway Centre lapel badge

A good original circa 1950's silver plated and enamel badge, the centre depicting the St. John Ambulance Maltese Cross logo with outer title circlets 'The St. John Ambulance Association' 'Southern Railway Ambulance Centre'. Very good condition, complete with original buttonhole fitting, no damage to the enamel, silver plated finish remains bright. Diameter 26mm.