Exceptional Horological Works of Art

Geneva, Oct 19, 2002

LOT 5

Patek Philippe & Cie., Genève, No. 161220, case No. 280134, made for The Sweeney Jewelry Co., Houston, Texas, circa 1912. Very fine 18K gold keyless pocket chrono-meter with 36-hour power reserve indi-cator, awarded the third prize at the Geneva Astronomical Observatory timing contest 1912-1913.

CHF 25,000 - 30,000

EUR 17,000 - 22,000

Sold: CHF 27,600

C. Four-body, "bassine", polished with concealed hinges, gold hinged cuvette engraved with the prize awarded. D. White enamel with Breguet numerals, outer minute track, sunk subsidiary seconds, sector for up-and-down indicator below 12 o’clock. Blued steel "spade" hands. M. 40.5 mm. (18’’’), "Extra" quality, rhodium-plated, "fausses-côtes" decoration, 21 jewels, counterpoised straight line lever escapement, anibal-brass Guillaume compensation balance, eight adjustments by C. Batifolier, Breguet balance spring with "swan-neck" micrometric index. Signed on the dial, case and movement. Diam. 50 mm.


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Grading System
Grade: AAA

Excellent

Case: 3

Good

Movement: 3*

Good

Overhaul recommended, at buyer's expense

Dial: 3 - 01

Notes

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