Important Watches and Wristwatches
LOT 259
Patek Phillippe & Cie., Genève, No. 861137, case No. 681113, made in 1954, First class "Bulletin d' Observatoire" Chronometer, awarded 43.77 points at the Geneva Observatory. Extremely fine and rare, 18ct gold gentleman's wristwatch.
C. massive. polished, waterproof, screwed back, concave bezel. D. silver with applied gold indexes + auxiliary seconds dial at 9 o'clock. "Dauphine" gold hands. M. 13"', Geneva Quality Hall Mark, rhodiumed, "fausses-côtes" decoration, 21 jewels. lever escapement adjusted by Andre Zibach, specialized in Observatory Chronometers, Guillaume balance, adjusted to heat, cold isochronism and 5 positions, bent steel balance-spring, micrometer regulator. Dial, case and movement signed. In excellent condition. Diam. 38 mm.
Estimate: 300,000 CHF - 350,000 CHF
Grading system

C D M  
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A similar watch is published in "Patek Philippe Wristwatches", page 194. Timing Contests: - Mean daily compensation error: 15,92 - Rate recovery after extremes: -0,22 - Error of compensation per degree C: - 3,81 - Mean error in 6 positions: 5,32 - Subsidiary compensation error: + 0,78 It is the first time that such a chronometer wirstwatch by Patek Philippe is offered at auction. This is the most interesting one of the two others known, for its case which has the same design as the Ref. 2499, the famous perpetual calendar chronograph with round buttons, and furthermore, it is waterproof.
Important Watches and Wristwatches
Sold including buyer's premium:
608,500 CHF