American aviator and executive (1898–1982) whose company produced, amongst other notable aircraft, Lindbergh’s Spirit of St. Louis. Glossy 8 x 10 photo, signed and inscribed in black felt tip “To Harry C. Block, Jr., T. Claude Ryan.” Scattered creases, marks, and impressions, some light spotting to finish, and rippling to the top and bottom edges, otherwise fine condition. RRAuction COA.