41,400 CHF
Vacheron & Constantin, Genève, “Chronomètre”, No. 408565, case No. 257375. Made in 1930. Very fine and extremely rare, keyless, slim 18K yellow gold pocket lever chronometer with split-seconds chronograph and instantaneous 30-minute register and Guillaume balance, adjusted by master adjuster Edmond Olivier. Awarded the “Certificat de Première Classe pour pièces compliquées” from the Geneva Observatory in 1931, obtaining 685.8 points. Accompanied by a Certificate of Authenticity and a copy of the Observatory Certificate. White enamel with Breguet numerals, outerminute track with five-seconds/minute Arabic markers, outermost tachometer scale in red and blue, sunksubsidiary seconds, 30-minute register at 12. Cal. 17/19’’’ P.C.A.B., nickel, 27 jewels, straight line lever esca-pement,Guillaume balance with eight adjustments and gold timing screws, Breguet balance-spring with doubleovercoil, Vacheron & Constantin micrometer regulator (Patent CH 101652, registered on 1 November 1923).Dial, case and movement signed.Diam. 51 mm. Notes The Observatory Certificat records the follwing results: mean error for 6 positions: 3.68; compensation error by degree: 0.078; change of rate with change of position: 1.04. The more complicated a timepiece is, the more difficult it is to adjust, particularly as concerns complications such as a chronograph, split-seconds function, and/or a register. The additional wheelwork affects the timepiece's functioning, because of the amount of energy requi
Auctioneer:
Antiquorum
Date:
2005-04-03
