Importantes Montres de Collection

Geneva, May 15, 2011

LOT 452

Watch With 5 Complications Ed. Koehn, Genève, ?Chronomètre 1ere Qualité?, No. 64340. Made circa 1900. Very fine and rare, large, 18K yellow gold keyless pocket watch with perpetual calendar, moon phases and lunar calendar.

CHF 15,000 - 20,000

USD 16,000 - 22,000 / EUR 11,000 - 15,000

Sold: CHF 18,750

C. Four-body, ?bassine?, polished. Hinged gold cuvette engraved with the technical details. D. White enamel with black Breguet numerals, outer minute track, subsidiary dials for the months and four-year cycle, the date, day of the week, seconds combined with lunar calendar (in red), aperture for the phases of the moon. Black Breguet hands. M. 1st quality, 19???, rhodium-plated, 21 jewels, wolf?s tooth winding, straight-line ?moustache? lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring with double overcoil, screw micrometer regulator. Cuvette signed. Diam. 52 mm.


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Grading System
Grade: AAA

Excellent
Case: 2

Very good
Movement: 2*

Very good

Overhaul recommended, at buyer's expense
Dial: 2-01

Very good

HANDS Original

Notes

Edward Koehn (1839-1908) Was the son of Karl Koehn, a watchmaker to the court of the Grand Duchy of Saxe-Weimar-Eisenach. He came to Geneva in 1859, and studied at the Ecole d?Horlogerie. In 1861, he began working at Patek Philippe, as a mere employee. After 15 years of loyal service, he became Director. In 1891, Edward Koehn left Patek and bought the Robert Ekegren firm. Koehn constructed very high quality flat and extra-flat watches, repeating watches, chronographs, and fly-back chronographs. The firm, at the Grand Quai, made watches for Tiffany, New York, and on June 8, 1912, patented a watch with hanging barrel and pendant winding, as well as the ?Roseau?, under the No. 31470; and the ?Thermindex? on February 13, 1922 under the No. 51304.