Important Collectors' Watches, Pocket...

Geneva, Mar 16, 2008

LOT 476

Deck Watch with Guillaume Balance Ulysse Nardin, Locle, Suisse, No. 124447, case No. 669358. Sold on October 21, 1943. Very fine, stainless steel keyless deck lever chronometer with power reserve indicator and Guillaume balance in the original three-tier wooden deck box. Accompanied by the Bulletin de Marche.

CHF 5,000 - 7,000

USD 4,500 - 6,300 / EUR 3,100 - 4,300

C. Three-body, polished, screwed-down back. Stainless steel cuvette. D. White enamel, bold radial Roman numerals, outer minute track, power reserve indicator below 12 o'clock, subsidiary seconds. Blued steel spade hands. M. 48 mm., (21'''), frosted gilt, 18 jewels, straight-line lever escapement, anibal-brass Guillaume balance with blued steel Breguet balance spring, patented cam-type micrometer regulator. Dial, case and movement signed. Diam. 65 mm.


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Grading System
Grade: AA

Very good

Case: 3

Good

Movement: 3*

Good

Overhaul recommended, at buyer's expense

Dial: 2-01

Very good

HANDS Original

Notes

Guillaume Balance In 1899, Dr. Charles Edouard Guillaume noticed that steel with an addition of 44.4% nickel had a negative square coefficient of thermal expansion. This alloy, combined with brass in bimetallic lamina, makes its expansion close to quadratic. Balances with bimetallic rims made of anibal (anibal, an alloy invented by Guillaume, stands for (Acier au NIckel pour BaLanciers) and brass are usually called Guillaume balances, or, as their inventor called them, integral balances. When combined with special balance springs, they exhibit remarkable temperature stability, on occasion not exceeding 1/50 second per day at 1oC.