Pocket watch: absolute rarity, astronomical Ankerchronometer…

Valeur estimée
€ 20 000 – 100 000
Date de l'enchèreClassic
02.03.2024 16:30UTC +02:00
Acceptation des offres fermée pour cette enchère
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Auctioneer
Karl-Heinz Cortrie GmbH
Lieu de l'événement
Allemagne, Hamburg
ID 1163703
Lot 4236 | Pocket watch: absolute rarity, astronomical Ankerchronometer…
Pocket watch: absolute rarity, astronomical Ankerchronometer with equation of time, Henry Moser, with original box, ca. 1860
Ca. Ø53mm, approx. 139g, 18k gold, hunting case à-goutte, engine turned, dome signed, exquisite Ankerchronometer movement with special lever, chronometer balance with gold screws and platinum screws, Le Coultre calibre, signed, key-winding, original enamel dial, inscribed on the edge" Equation du Temps Vrai", triple calendar, moon phase and equation of time display, seconds display, blued steel hands, excellently preserved engine turning, in beautiful original condition, presented in the original mahogany box with Cyrillic inscription Henry Moser Watch Shop St. Petersburg, in working order. The pusher for the moon phase and day of the week, which can be adjusted forwards or backwards by means of a slide, is an exceptionally rare invention by Eugene Le Coultre. The equation of time complication is rarely found on pocket watches, for example at Breguet. Eugène Lecoultre (1819-1882) created an ingenious system for setting the date. We have here a watch with a triple date whose duration of each month is 31 days, like all rare watches of the time equipped with this type of horological complication. Eugène Le Coultre's system allows the date to be quickly corrected manually at the end of each month by running both forwards and backwards! In addition, this correction of the date automatically adjusts the day of the week, but also the phase of the moon. Even more complicated, this correction does not change the equation of time system (whose cams make one revolution per year), but also adjusts it! Everything is achieved by a mechanical device that can be seen on the left side of the movement. For the time, this was one of the most sophisticated calendar watches, independent of some of the earlier achievements of Abraham-Louis Breguet (1747-1823) and the perpetual calendar watches with retrograde dates in which Eugène Lecoultre specialised in Geneva. Equation of time: This complication turns the watch into a sundial. The watch shows noon exactly every 24 hours. The sundial, on the other hand, shows noon when the sun is at its highest point. However, due to the inclination of the earth's axis and the eccentricity of the earth's orbit, the sun is not always at its highest point at the same time. A watch with equation of time (also called equation) indicates how large the difference is at any given time. Henry Moser was an ingenious watchmaker and was appointed Court Watchmaker to the Russian Tsar. His shop was located in St Petersburg. Provenance: Basel "Important Watches" 1990, estimated price at the time Swiss Francs 80,000-120,000 (https://www.cortrie.de/go/9xB).
Adresse de l'enchère Karl-Heinz Cortrie GmbH
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