Pioneering aviation engineer (1889-1972) who developed the first four-engine airplane and the first modern helicopter to be put into widespread use. TLS signed “I. Sikorsky,” one page, 8.5 x 11, Vought-Sikorsky Aircraft letterhead, November 3, 1942. Letter to John Wood at the Harvard Club in New York, thanking him for "the copy of your book, 'Airports'…which I shall be glad to keep on hand as a valuable source of information and reference." In fine condition, with some light soiling to the bottom edge.
This item is Pre-Certified by PSA/DNA
Buy a third-party letter of authenticity for
$35.00
*This item has been pre-certified by a trusted third-party authentication service, and by placing a bid on this item, you agree to accept the opinion of this authentication service. If you wish to have an opinion rendered by a different authenticator of your choosing, you must do so prior to your placing of any bid. RR Auction is not responsible for differing opinions submitted 30 days after the date of the sale.