Metropolitan Special Constabulary police chromium plated cap badge Firmin London

A scarce original circa 1936 to 1964 late issue 'Metropolitan Special Constabulary other ranks cap badge' large chromium plated King's crown title circlet, Royal Arms to centre, the reverse with maker's details 'Firmin London'. Very good condition, complete with original two loop fittings and split pin, minimal wear. Height 49mm. See: Special Constabulary Insignia of England and Wales Second Edition by Dave Wilkinson and Jeff Cowdell.