WW2 Staffordshire County Special Constable police badge

A good original Second World War period 'Staffordshire County special constable lapel badge', chromium plated enamel example, the central disc depicting a 'Stafford Knot' and 'SC' on blue enamel ground, the reverse impressed with maker's details 'Thomas Fattorini Ltd Regent St. Birmingham' and official low issue number '160'. Very good condition, complete with original buttonhole fitting, no damage to the enamel. Height 29mm.