Inventor of the jet engine (1907–1996). Five items: flight-flown commemorative cover, bearing a cachet honoring Whittle, signed in back ballpoint by Whittle and one other; two 6 x 4 commemorative cover informational cards, each signed in black ink; and two 1990 one page ALSs, each signed “Frank.” In fine overall condition, with intersecting folds to both letters. R&R COA.
