744 - Longines Lindbergh Hour Angle watch, anniversary edition of the Atlantic flight, full set, 1987

Longines Lindbergh Hour Angle watch, anniversary edition of the Atlantic flight, full set, 1987 Stainless steel, 1987. Longines Lindbergh Hour Angle watch, reference 989.5215, case number 22.213.508 (per certificat d'origine), anniversary edition for the 60th anniversary of Charles Lindbergh's Atlantic crossing. Knurled rotating bezel with minute/second graduation '15/30/45', onion crown. White dial with black Roman numerals, blue degree scale to '180' and 'LONGINES' designation, central rotating silver-coloured disc with red graduation for determining the hour angle. Blued baton hands and blued centre seconds. The case back engraved with the historic Longines signet 'E. F. Co.' with winged hourglass. Hinged case back cover, engraved inside with 'Designed by Col. Charles A. Lindbergh' and reference 989.5215, beneath it a glass back showing the automatic movement, calibre Longines L989.2, inscribed 'TWENTY-FIVE 25 JEWELS'. Watch runs. Black, grained leather strap with folding clasp. Full set with outer carton, wooden watch box, booklets, guarantee card/certificat d'origine (date of sale 08.02.89) and original receipt (Juwelier Brühöfner, Rinteln, for DM 2,250). All in good worn condition. D. 40 mm, H. 10 mm, strap length approx. 22 cm, box 12x18x8 cm (WxDxH). After his solo flight across the Atlantic in 1927, Charles Lindbergh developed the Hour Angle watch together with Longines (1931): by means of the rotating central disc and the degree scale, combined with a radio time signal, the hour angle and thus the longitude of one's position can be determined – an important aid to celestial navigation. Longines, official timekeeper of the Lindbergh flight, reissued the model in 1987 for the 60th anniversary in the present reference 989.5215.