Longines, Hour Angle Watch designed by Col. Chs. A. Lindbergh, a gentleman's Swiss 18ct gold round automatic wristwatch, recent, ref; 5230-628, no.24678485, the duo-tone silvered and white dial with black Roman numerals, Arabic 0-180 degree chapters, sweep centre seconds and black Breguet hands, round two piece case with a bi-direction rotating bezel with green and black Arabic numerals, and an 'onion' winding crown, Swiss marks and stamped '18K 750', on a brown leather, Swiss 21 jewel automatic movement, cal. L6282 ETA 2892-2 Note; The original Hour Angle watch was a designed by Col. Charles Lindberg soon after his historic trans-Atlantic flight in 1927, as an aid to navigation for pilots. This re-edition retains many of the original features of the original styling including the 'onion' winding crown and Breguet hands. The dial is also the same as the original with a duo-tone design, and an indication of longitude (in degrees & minutes), the central silvered dial originally rotating for the synchronization of the seconds hand with a radio time signal, the rotating bezel to allow adjustments to daily variations in the equation of time. When used in conjunction with a sextant and a radio to receive the time signal the original watch made it possible to determine the Greenwich hour angle i.e. Longitude
Longines, Hour Angle Watch designed by Col. Chs. A. Lindbergh, a gentleman's Swiss 18ct gold round automatic wristwatch, recent, ref; 5230-628, no.24678485, the duo-tone silvered and white dial with black Roman numerals, Arabic 0-180 degree chapters, sweep centre seconds and black Breguet hands, round two piece case with a bi-direction rotating bezel with green and black Arabic numerals, and an 'onion' winding crown, Swiss marks and stamped '18K 750', on a brown leather, Swiss 21 jewel automatic movement, cal. L6282 ETA 2892-2 Note; The original Hour Angle watch was a designed by Col. Charles Lindberg soon after his historic trans-Atlantic flight in 1927, as an aid to navigation for pilots. This re-edition retains many of the original features of the original styling including the 'onion' winding crown and Breguet hands. The dial is also the same as the original with a duo-tone design, and an indication of longitude (in degrees & minutes), the central silvered dial originally rotating for the synchronization of the seconds hand with a radio time signal, the rotating bezel to allow adjustments to daily variations in the equation of time. When used in conjunction with a sextant and a radio to receive the time signal the original watch made it possible to determine the Greenwich hour angle i.e. Longitude
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