17,250 CHF
Breguet, Paris, No. 3290, circa 1935.Very fine two-tone 18K gold and silver keyless lever pocket chronometer winner of gold medal and Bulletin de Premiere Classe in Besançon, with original gold medal and original Bulletin de Marche. Four-body, "Empire", polished with reeded band, bezels with silver edges, gold hinged cuvette, silver bow. Silver, engine-turned center and outer border, champlevé radial Roman numerals, outer minute dot divisions, subsidiary seconds. Blued steel Breguet hands. Notes The viper's head was the official Besançon Observatory hallmark, acknowledging the fact that the watch took part in one of their timing contests.Results of the Bulletin de Marche: Maximum average variation + 2.01 Variation between horizontal and vertical positions - 0.82 Average daily error ± 0.218 Average positional error ± 68 Temperature compensation error for 1ºC + 0.09 Restart - 1.96It is very rare to find a watch accompanied by its original papers, box and medal.Anibal (acier au nickel pour balanciers),an alloy invented by Dr. Charles Edouard Guillaume, exhibits unusual properties, both in terms of thermal expansion and in changes in elasticity. These properties are very different from those of two other famous alloys invented by Guillaume, Invar and Elinvar. At the end of the 1800's, Guillaume attempted to eliminate the so-called Middle Temperature Error caused by the fact that the change of rate in a timekeeper with a steel-brass bimetallic balance is ap-proximately a
Auctioneer:
Antiquorum
Date:
2002-11-16
