$8,750
LONGINES SIDEROGRAPH ALUMINIUM Longines Watch Co. , "Service Hydrographique de la Marine", No. 5789255. Made circa 1943. Very fine and rare aluminium, siderograph with center-seconds, seconds recorder, split-seconds, 36-hour power reserve indication and stop feature, in a gimballed mahogany deck box. Deck box with brass bound corners, aluminium gimbal and external start-stop for the chronograph. Inner: Cylindrical, massive, back secured by five screws, chronograph pushbutton at 8 o'clock, knob for setting revolving 60 seconds dial at 5 o'clock, winding/setting stem at 12 o'clock, start/stop lever at 10 o'clock, glazed back remo-vable screw-on WEIGHT to work with the gimbals. Two-tone, silvered, black Arabic numerals, outer minute track, with outer revolving blue chronograph ring, power-reserve sector below the 12. 21''', Cal. 21.29, rhodium-plated, fausses cotes decoration, 17 jewels, straight-line lever escapement with beryllium pallet fork, monometallic balance, self-compensating blued steel Breguet balance spring with micrometric cam-type regulator, chronograph work visible on the back plate. Notes Dial, movement and deck box signed. DECK BOX 15.3 cm.x 15.3 cm.x 100 cm. INNER DIAM. 94 mm. Invented by LONGINES in 1938, the "Siderograph" measures GREENWICH (0 longitude) SIDEREAL or CIVIL TIME in hour angles, minutes and minutes of arc, and can be considered the final evolution of the marine chronometer. These timepieces allow the user to navigate at night as Read more…
Auctioneer:
Antiquorum
Date:
2016-10-08
