18,880 CHF
Deck Chronometer Patek, Philippe & Cie, Genève, “Deck Chronometer” No. 132659, case No. 239486. Made in 1905 for the German market, sold on September 15th, 1911. Very fine, early, silver, deck and pocket lever chronometer destined for observatory trial, with 36-hour power-reserve indicator and Guillaume balance. Accompanied by the Extract from the Archives. Four-body, bassine, polished. Hinged silver cuvette. Heavy, solid silver, bold champlevé radial Roman numerals, outer champlevé minute track, champlevé power-reserve sector below 12, champlevé subsidiary seconds. Blued steel spade hands. 21”’, numbered twice,18 jewels, counterpoised straight-line lever escapement, anibal-brass Guillaume balance with “winged” arms, gold and platinum temperature adjustment screws, blued steel Breguet balance spring with inner and outer terminal curves, diamond endstone, swan-neck micrometric regulator, Patek, Philippe keyless winding (Swiss patent 2680, 27 September 1890.) Dial, case and movement signed. Diam. 60 mm. From “The Collection” Notes Anibal (acier au nickel pour balanciers): an alloy invented by Dr. Charles Edouard Guillaume, exhibits unusual properties, both in terms of thermal expansion and in changes in elasticity. These properties are very different from those of two other famous alloys invented by Guillaume, Invar and Elinvar. Around 1900 Guillaume attempted to eliminate the so-called Middle Temperature Error caused by the fact that the change of rate in a timekeeper
Auctioneer:
Antiquorum
Date:
2007-11-11
