Important Modern & Vintage Timepieces

Geneva, May 15, 2016

LOT 292

GRANDE ET PETITE SONNERIE CLOCKWATCH BULLETIN D OBSERVATOIRE YELLOW GOLD Swiss, retailed by Hauser Zivy & Cie., Mexico-Paris, "La Esmeralda", No 6871. Made circa 1900. Very fine and extremely rare, large hunting-cased, 18K yellow gold, trip minute-repeating, two-train, grande and petite sonnerie keyless Chronometer clockwatch, Bulletin de l'Observatoire obtained at the Observatory of Neuchatel in 1902.

CHF 8,000 - 12,000

HKD 64,000 - 96,000 / USD 8,300 - 12,400

Sold: CHF 42,500

Four-body "demi-bassine et filets carrure ronde", polished with engine- turned back. Hinged gold cuvette engraved with the technical and retail details highlighted with blue, white and black enamel. White enamel, three-piece with narrow radial Roman numerals, subsidiary seconds. Black steel pear hands. 44 mm., 19''', rhodium-plated, fausses cotes decoration, twin barrels with differential tandem winding, 36 jewels, three in screwed chatons, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring with overcoil and swan-neck micrometer regulator, striking and repeating on gongs by means of a trip slide on the band, sonnerie/silence and petite sonnerie/grande sonnerie selection levers under the bezel.


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Grading System
Grade:
Case: 2-8

Very good

Slightly scratched
Movement: 2*

Very good

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

Very good

HANDS Original

Notes

Dial and cuvette signed for the retailer. DIAM. 57 mm. THICKNESS 16 mm. Any complication such as a striking train affects the timekeeping of a watch meaning that watches with striking, repeating or chronographs were not usually submitted for observatory trial, certainly a clockwatch would not normally be considered to be a precision watch. However, this watch was awarded a certificate from the OBSERVATORY OF NEUCHÂTEL and as such is extremely rare. ANTIQUORUM sold a similar piece housed in an openface case (08-06-2008 HK, lot 124) that was only 3 numbers away.