Pioneer aviation engineer (1889–1972) who developed the first four-engine airplane and the first modern helicopter to be put into widespread use. Vintage glossy 5 x 3.25 photo of a seaplane, signed in fountain pen, “I. Sikorsky.” Matted with a color portrait of Sikorsky and an airmail stamp, to an overall size of 8 x 10. Some light creases, paperclip impression to top left, some light contrast to signature, and a notation in lower border, otherwise fine condition. R&R COA.
