Important Wristwatches, Watches & Clocks

Geneva, Hotel Des Bergues, Oct 14, 1990

LOT 483

Patek Philippe & Cie., Genève, No. 197998, case No. 416549, specially made for Thomas Emery in 1928.

CHF 300,000 - 350,000

Extremely fine and rare 18 ct. gold pocket chronometer with a one minute tourbillon regulator, awarded the first prize, for a record number of 843 points at the Geneva 1929-1930 Observatory contest, with an additional special prize for the mean time variation, with photocopy of the Geneva Observatory Register. Double body massive "bassine" polished case with invisible hinges, the blue champlevé enamelled monogram: "T.E." on the back. All the informations about the awarded prize are engraved inside the back. Glazed gold cuvette. Fine unusual white enamel dial with blue Breguet numerals and subsidiary seconds. Gold Louis XV hands. Extremely fine rhodium plated 18"' "Extra" quality movement, "fausses côtes"decoration, 18 jewels, one minute tourbillon with polished steel equidistant armed carriage driven by the minute wheel, equilibrated lateral lever escapement, brassinvar Guillaume balance, 3 heat and cold, isochronism and five position adjustments by François Modoux, blued steel balance spring with a terminal curve. Signed on the dial, case and the movement. In excellent condition. Diam. 51 mm.


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Notes

Geneva Observatory contest 1928 l st class contestCategory B. Sum of 40 daily compensation errors: 5: 4'24. Sum of errors for the 6 positions 5: 1'84. Compensation error c: 0'019 Rate recovery after extremes:r:-0'24 Total of marks: 843 Awarded the 1 st prize. Escapement with tourbillon regulator. Steel balance spring with terminal cuivre. Guillaume balance. Dimension 43 mm. This chronometer was the best of 28 which awarded a prize at the 1928 Geneva Observatory Contest, in the pocket chronometer category. The first got 843 marks, the last one 602 marks out of a maximum of 1000 marks. This chronometer awarded the record prize of all the pieces presented in all categories and the record prize for the mean daily error.