Patek Philippe. An extremely fine and rare 18K gold openface perpetual calendar keyless lever watch with up and down indicator, phases of the moon, Guillaume balance, one minute tourbillon and Bulletin d'Observatoire
Patek Philippe. An extremely fine and rare 18K gold openface perpetual calendar keyless lever watch with up and down indicator, phases of the moon, Guillaume balance, one minute tourbillon and Bulletin d'Observatoire

SIGNED PATEK PHILIPPE, GENEVE, REF. 969, NO. 198'336, CASE NO. 2'872'513, MOVEMENT MANUFACTURED IN 1929, COMPLETED AND ENCASED IN 1993

Details
Patek Philippe. An extremely fine and rare 18K gold openface perpetual calendar keyless lever watch with up and down indicator, phases of the moon, Guillaume balance, one minute tourbillon and Bulletin d'Observatoire
Signed Patek Philippe, Geneve, ref. 969, No. 198'336, case no. 2'872'513, movement manufactured in 1929, completed and encased in 1993
Cal. TO 22''' IRM Q nickel-finished movement stamped twice with the Geneva seal, 20 jewels, Guillaume balance with gold poising screws, polished steel three arm one minute tourbillon cage by James Pellaton, central jewel carried in gold screwed châton, blued steel hairspring, glazed dust cover, the white dial with gold dial plate, Roman numerals, blued steel spade hands, four subsidiary dials indicating phases of the moon combined with 38 hours power reserve indication, day combined with 24 hours indication, month combined with leap year, date combined with constant seconds, in massive circular case with five-bar hinges, case, dial and movement signed
63 mm. diam.
Further details
END OF SECOND SESSION

Lot Essay

Accompanied by Patek Philippe Certificate of Origin and Extract from the Archives confirming production of the movement of the present watch in 1929. It was completed and encased in 1993 and sold on 19 September 2001. The Extract confirms that a Geneva Observatory First Class certificate was obtained. Furthermore delivered with Patek Philippe burgundy leather bound file containing technical information and instruction manual for reference 969, original fitted wooden presentation box, gold and wooden setting pin, outer packaging.

According to the registers of the Geneva Observatory, the present watch participated at the 1945 timing contest for which it had been prepared and adjusted by the renowned precision adjuster Hermann Heck. It was then presented again in 1957, adjusted by A. Zibach, and obtained 50.71 points.

The present watch is amongst the most impressive tourbillon watches by Patek Philippe ever offered at auction. It was conceived by the celebrated watchmaker, inventor and engineer James Pellaton from LeLocle in 1929, then delivered to Patek Philippe in Geneva. In 1945 it participated at a Category A timing contest at the Geneva Observatory, one of the most gifted and prominent precision adjuster, Hermann Heck, had prepared and adjusted the movement for this trial (see Reinhard Meis Das Tourbillon, p. 353).

In 1993 it was updated with the perpetual calendar and power reserve mechanisms, encased and sold on 19 September 2001.

Research has resulted in the discovery of only one other example of reference 969: it is on permanent exhibition at the prestigious, newly renovated Patek Philippe boutique at Rue du Rhône in Geneva.

It is important to mention that the present watch combines all aspects of the highest quality, making it a superb example for the demanding collector. One of the most discerning complications, the tourbillon regulator combined with a perpetual calendar and up and down indicator, fitted in a state of the art gold case, documented with the Extract and timing extracts and in as good as unused condition.

Fresh to the market, the rarity of this horological masterpiece is furthermore enhanced by the fact that it is also the first example of a Patek Philippe pocket watch featuring such complications to appear in public to date.

The Tourbillon
On 10 November 1801, horological legend Abraham Louis Breguet (1747-1823) received a patent for his ingenious tourbillon invention. Breguet designed the tourbillon (or whirlwind) to compensate for fluctuations and errors in time measurement caused by the position a watch is placed in. For example, watches with traditional movements may keep excellent time when resting on a desk horizontally, but when that same watch is placed vertically in a pocket, gravity affects the frequency or rate of the escapement and thus its accuracy.

Breguet's invention compensated for these gravitational effects by placing the escapement in a revolving carriage. As the tourbillon carriage revolves (usually one entire revolution per minute), its position constantly changes and consequently the fluctuations in rate caused by gravity are averaged out. Once a tourbillon watch is properly adjusted, the effects of gravity are essentially nullified, regardless of how it is positioned.

Precision timekeeping has always been vital to the scientific community, and in 1873, the first annual chronometer competition was held at the Geneva Astronomical Observatory. Rigorous quantitative internationally recognized testing standards were established. The testing, which initially lasted for 40 days, consisted of placing the watches in various positions and temperature conditions. The prestigious watchmakers Patek Philippe were awarded First Prize in the competition as early as 1884.

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