Pioneering aviation engineer (1889-1972) who developed the first four-engine airplane and the first modern helicopter to be put into widespread use. Two items: a personal check, 6 x 2.75, filled out in type and signed by Sikorsky, "I. Sikorsky," payable to Galina Sikorsky Viner for $100, December 29, 1952; and a vintage matte-finish 7.75 x 10 photo of Sikorsky holding a model replica of his military helicopter, signed and inscribed in blue felt tip, "To Michael Levin, with best wishes, I. Sikorsky, Jan. 12, 1970." In overall fine condition, with rippling to the top and bottom edges of the photo. From the collection of Dr. Lawrence E. Miller. From the collection of Dr. Lawrence E. Miller.
