(AVIATORS.) SERGIEVSKY, BORIS. Three items, each Signed: Group Photograph * Autograph Letter *...

(AVIATORS.) SERGIEVSKY, BORIS. Three items, each Signed: Group Photograph * Autograph Letter * Flown envelope. The photograph, showing the crew who helped him during the summer 1930 record-breaking seaplane flights, signed twice in the image, one at upper edge, the other vertically at center. 5x7 inches; remnants of prior mounting at corners recto. The letter, to George Albert Ingham, sending a photograph [present] and describing the crewmembers shown. 1 1/2 pages, 4to, "Sikorsky Aviation" stationery, written on recto and verso of a single sheet; folds. The envelope, with ink stamp commemorating the Giant Sikorsky S-42 flight on May 17, 1934, during which the world's record for payload-to-height was broken. Additionally signed by pilot Raymond B. Quick. 8-cent stamp at upper right cancelled on June 21, 1934. 3 1/2x6 1/2 inches; remnants of prior mounting at corners recto. [Bridgeport, 24 January 1934]; Np, circa 21 June 1934