6,250 CHF
W. F. SCHULZ - SILVER LEVER CHRONOMETER PRECISION WATCH FOR GENEVA OBSERVATORY TRIAL - WITH ORIGINAL 1ST CLASS BULLETIN DE MARCHE W. F. Schulz, Genève, "Chronomètre de Bord", No. 101065, Made circa 1918. Very fine and extremely accurate, large, silver, keyless lever Chronometer watch with blue sapphire jewels, Guillaume balance, achieved 1st Class Bulletin de Marche from the Observatoire de Genève on February 27, 1919, régleur: H. Lossier. Accompanied by the original Bulletin de Marche. Four-body, "bassine", polished. Hinged silver cuvette. White enamel, radial Roman numerals, outer minute track, subsidiary seconds. Silver spade hands. 20''', rhodium plated, fausses côtes decoration, 18 jewels, the upper ones blue sapphire, stamped twice with the seal of Geneva quality mark, straight line lever escapement, Guillaume compensation balance with gold temperature and meantime adjustment screws, blued steel Breguet balance spring with terminal curve, index regulator, wolf's tooth winding. Notes Case and movement signed W.F.S., movement numbered twice and case numbered. DIAM. 62.5 mm. The present watch was sent for trial at the OBSERVATOIRE DE GENÈVE between 30th December, 1918 and 17th February, 1919. It achieved a First Class Bulletin de Marche on 27th February, 1919 with an extremely small variation over the testing period of only +0.90 of a second. The Régleur concerned was MONSIEUR H. LOSSIER. Being a watchmaker of such evident ability, it is surprising that no in
Auctioneer:
Antiquorum
Date:
2015-03-15