A twin blade mahogany propeller by The Integral Propeller Co Limited, circa 1915
A twin blade mahogany propeller by The Integral Propeller Co Limited, circa 1915, the central hub embossed IPC, DG 93A, HP 80 GNOME, AVRO BIPLANE, B23848, with eight mounting holes and 2¼ inch diameter inner hub, each blade applied with manufacturer's transfer, 256cm diameter.

