Irvin Air Chutes Parachute Company qualification badge

A scarce ORIGINAL 'Irvin Air Chutes Parachute Company qualification pin badge', gilt brass winged canopy inlaid with light blue and white enamel 'Irvin' title below, the reverse impressed with curved maker's details 'H.W.Miller Ltd Branston St B'Ham.18' (an address format used between 1935 and 1958). Very good condition, complete with correct original clamped joint coiled pin fitting and hooked catch, no stress marks or damage to the enamel. Width 33mm. Height approx 20mm.