1,875 CHF
ULYSSE NARDIN SILVER 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. Three-body, solid, polished, "bassine", screw-down back. White enamel with radial Roman numerals, outer Arabic minute and seconds ring with fi fths of a second divisions. Blued steel spade hands. 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. Notes Guillaume Balance In 1899, Dr. Charles Edouard Guillaume noted that steel with an addition of 44.4% nickel had a negative square coeffi cient 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.
Auctioneer:
Antiquorum
Date:
2012-05-13
