Patek Philippe & Cie., Genève, No. 138623, case No. 251975, made in 1907, sold to Ryrie Bros., Toronto, Canada., on 2 April 1909. Very fine 18 ct. gold keyless pocket chronometer, awarded the Mention Honorable, at the Geneva Astronomical Observatory timing contest in 1908. | Important Collectors Wristwatches Pocket Watches & Clocks | Geneva, Hotel Des Bergues, 21st October 1995

Important Collectors Wristwatches Po...

Geneva, Hotel Des Bergues, Oct 21, 1995

LOT 815

Patek Philippe & Cie., Genève, No. 138623, case No. 251975, made in 1907, sold to Ryrie Bros., Toronto, Canada., on 2 April 1909. Very fine 18 ct. gold keyless pocket chronometer, awarded the Mention Honorable, at the Geneva Astronomical Observatory timing contest in 1908.

CHF 7,000 - 8,000

C. Four body, massive, "demi-bassine", polished. Hinged gold cuvette. D. White enamel with Breguet numerals, outer red Arabic minute ring and sunk subsidiary seconds. Gold "Louis XV" hands. M.18"' " Extra quality", rhodium plated, "fausses côtes" decoration, 21 jewels, counterpoised straight fine lever escapement, brass-invar Guillaume balance, "Extra" adjustment by W. Beaufrère, Breguet balance spring with swan neck micrometric index. Signed on the dial, case and movement. In very good condition, with photocopies from the records of the timing contest and certificate. Diam. 49 mm.

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Timing Contest : - Mean average daily rate +/- 0,23 - Restart period - 0,38 - Error of compensation per degree C +/- 0, 066 - Mean error in 6 positions +/- 0,62 This chronometer with 219.2 marks, was the 108th out of 160 classified. The first one with 268.4 and the last one with 201.4, the maximum being 300 marks. 217 were entered for the contest.