Subasta Bidspirit | WHITTLE FRANK: (1907-1996) English Royal

WHITTLE FRANK: (1907-1996) English Royal Air Force officer, inventor of the jet engine. Blue ink sig... - WHITTLE FRANK: (1907-1996) English Royal Air Force officer, inventor of the jet engine. Blue ink signature ('Frank Whittle') and inscription and date, 2nd April 1966, in his hand on a 12mo blue piece of stationery. Together with Christopher Cockerell (1910-1999) English Engineer, Inventor of the Hovercraft. Bold blue ink signature ('Christopher Cockerell') on a white card, also adding the word Hovercraft in his hand beneath his signature. Some light wrinkling and creasing to Whittle's piece, not affecting the signature, about VG to EX, 2 £60-90