BSA Parabike, 1940s, used by British airborne troops.
'ELLO
Folding Parabikes could be loaded onto a Horsa glider or carried on a parachute drop. Over 70,000 were produced by BSA (British Small Arms) in Birmingham and hundreds were taken ashore or dropped from the sky on D-Day, 6 June 1944. Soldiers were given the impression that the bicycles were essential kit but they were quickly dumped as unnecessary nuisances.