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 3.5 x 6 photo of the engineer beside one of his helicopters, signed in fountain pen, “I. Sikorsky,” adding a sentiment and date. In fine condition, with some light creasing, and the signature a shade or two light, but completely legible. Pre-certified Steve Zarelli and RR Auction COA.
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