Australian Air League To Defend -To Develop fundraising badge

A scarce original circa World War II period 'Australian Air League celluloid tin button badge'; dark blue printed title surround 'Australian Air League' 'Sold By Gen. Secty. Only', the centre depicting a Byplane over the caption 'To Defend -To Develop' with the sum of '5/-' below. Very good clean condition, complete with original pin fitting.Diameter approx 25mm.