Important Modern & Vintage Timepieces

Geneva, Mar 15, 2015

LOT 350

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.

CHF 5,000 - 7,000

HKD 42,000 - 59,000 / USD 5,400 - 7,600

Sold: CHF 6,250

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.


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Grading System
Grade: AAA

Excellent
Case: 2-9

Very good

Scratched
Movement: 2*

Very good

Overhaul recommended, at buyer's expense
Dial: 2-01

Very good

HANDS Original

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 information can presently be found about W. F. SCHULZ. Being destined for Observatory Timing Contests, the movement of this watch, like those of other makers, was double engraved with the movement serial numbers.