Pioneer aviation engineer (1889–1972) who developed the first four-engine airplane and the first modern helicopter to be put into widespread use. Vintage sepia glossy 4.5 x 2.5 photo of a seaplane, signed in fountain pen “I. Sikorsky, July 31, 1939.” Matted with a portrait to an overall size of 11 x 14. A few small creases and surface marks, otherwise fine condition. R&R COA.
