Important Watches, Collector's Wristw...

Hotel Richemond, Geneva, Oct 13, 2001

LOT 173

Longines, "Ephémérides solaires", No. 025, Ref. 5234. Produced in a limited edition in 1989 to celebrate the 100th anniversary of the Firm.Very fine and rare, astronomic, center-seconds, self-winding, water-resistant, 18K yellow gold gentleman's wristwatch with hours, minutes, seconds, date, month, times of sunrise and sunset, solar decline and equation of time, with indication of the annual solar ephemerides, shown as a curve in a window whose coordinates are the date and hours. With certificate

C. three-body, solid, polished and brushed, case back with logo, revolving ridged bezel with the months of the year in black and a blue curve indicating the equation of time. Between the months are the scales separating them marked +5 +10 and -5 -10, zero being the center circle. The bezel is divided into 12 parts, each representing one month. At 6, locking lever for the revolving bezel. D. white with black enameled Arabic numerals, outer 1/5th second scale, above the 12 a window for the time ofsunrise, below the 12 a window for the time of sunset, at 3 a window for the date in Arabic numerals, at 9 for the month of the year in Roman numerals, over the 6, a window for solar decline surrounded by a blue painted representation of the Earth with the tropics of Capricorn and Cancer indication from 0° to 24°, 0° being the Equator. "Feuille" blued steel hands. M. Cal. L 640.1, rhodium-plated, 25 jewels, straight line lever escapement, monometallic balance, shock-absorber, self-compensating fat balance-spring.Dial, case and movement signed. Diam. 37 mm.