paperback. Illustrated with 3 large color plates, 1 of which has moveable flaps that lift to reveal the inner mechanical components of the motorcycle. Tall thin 4to, original wrappers which feature two dramatic & stylized photographic covers by Maurice Beck, printed in black with red text (rubbed and lightly foxed/stained; staples are a bit rusty which has caused some minor paper damage). (London: Shell- Mex, no date, circa 1930). A very good(+) copy.