Important Modern and Vintage Timepieces.

Geneva, Nov 13, 2010

LOT 63

Ulysse Nardin Deck Watch With Guillaume Balance Ulysse Nardin, Locle, No. 124165, case No. 620793. Made circa 1939. Fine, keyless, silver deck lever chronometer watch with indirect center seconds and Guillaume balance.

CHF 7,000 - 9,000

USD 7,000 - 9,000 / EUR 5,200 - 6,700

C. Three-body, solid, polished, "bassine", screw-down back. D. White enamel with radial Roman numerals, outer Arabic minute and seconds ring with fifths of a second divisions. Blued steel spade hands. M. 21???, frosted and gilt, 18 jewels, straight-line lever escapement, anibal-brass Guillaume balance, blued steel Breguet balance spring with terminal curve, micrometric regulator. Dial, case and movement signed. Diam. 56 mm.


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Grading System
Grade: AA

Very good
Case: 3

Good
Movement: 2*

Very good

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

Very good

HANDS Original

Notes

Guillaume Balance In 1899, Dr. Charles Edouard Guillaume noted 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.