Pioneer aviation engineer (1889–1972) who developed the first four-engine airplane and the first modern helicopter to be put into widespread use. Nice looking 8 x 10 photo of Sikorsky examining one of his models, signed and inscribed in the lower border in black felt tip “To Stefan Petterson, with best wishes of I. Sikorsky, Sept. 16, 1970.” In fine condition. R&R COA.
