Great Western Railway Centre St John Ambulance Association GWR pin badge

A scarce original circa 1940's period 'GWR Great Western Railway Centre St John Ambulance Assoc pin badge' nickel plated circular example surmounted by the 'London, Midland and Scottish Railway' heraldic company crest, a wing on torse bearing cross, the centre depicting the St. John Ambulance Maltese Cross logo with title surround, the reverse impressed with maker's details 'J.A.Wylie & Co London'. Very good condition, complete with original pin fittings.Height approx 35mm.