1929 De Havilland Aircraft Company workers identification badge

A scarce original 'De Havilland Aircraft Company production workers small unmarked silver coloured lapel badge' in the form of the companies logo, an aircraft fighter plane with blue enamel 'D' and 'H' superimposed over each wing, with 1929 below. Very good condition, complete with original buttonhole lapel fitting, no damage to the enamel.Height approx 17mm.