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Geneva, May 15, 2005

LOT 237

?Up and Down Chronometer? Patek Philippe & Co., Geneve, No. 161220, case No. 280134. Made in 1911 for the Sweeney Jewelry Co., Houston, Texas, sold on September 8, 1914. Very fine and very rare 18K yellow gold keyless pocket watch with 30 hour power reserve indication. Awarded the third prize Geneva Astronomical Obser-vatory Timing Contest 1912-1913. Accompanied by the timing contest rating certificate and the Extract from the Archives.

CHF 30,000 - 70,000

EUR 20,000 - 25,000 / USD 25,000 - 35,000

Sold: CHF 32,200

C. Four-body, "bassine", solid, polished, concealed hinge. Hinged gold cuvette engraved with details of the pizeawarded. D. White enamel, Breguet numerals, outer minute track, subsidiary seconds, sector for power reserveindicator below 12 o?clock. Blued steel "spade" hands. M. 19???, "Extra" quality, rhodium-plated, "fausses-côtes"decoration, 21 jewels, counterpoised straight line lever escapement, anibal-brass Guillaume compensationbalance, eight adjustments by C. Batifolier, Breguet balance spring with "swan-neck" micrometer regulator.Signed on the dial, case and movement.Diam. 50 mm.


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Grading System
Grade:
Case: 3

Good
Movement: 3 - 5 - 6*
Dial: 2 - 01

Notes

The official rating certificate of the Geneva Observatory was obtained on January 11, 1914. Timing Contest : - Mean average daily rate +/- 0"21 - Restart period - 0"36 - Error of compensation per degree C +/- 0"026 - Mean error in 6 positions +/- 0"51 For a note on the Guillaume balance, see lot 91. A similar watch is published in "Patek Philippe Wristwatches", by Martin Huber and Alan Banbery, 2004, p. 153.