Not signed (Tavernier), circa 1820. Rare 18 ct. gold Tavernier mechanical moon phase astronomie calendar key. | 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 491

Not signed (Tavernier), circa 1820. Rare 18 ct. gold Tavernier mechanical moon phase astronomie calendar key.

CHF 8,000 - 10,000

C. Empire, polished, glazed on both faces. D. White enamel on the front with days of the week and outer date ring (hair lins). Blued steel "arrow and serpent" hands. Polished gold on the rear face with moon phase aperture, its age engraved on the border. M. All the functions advance by depressing a small lever which protrudes out of the band each time the key is inserted on the winding square. In good condition. Diam. 23 mm.

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Notes

Atthough it is not signed, this key is absolutely identical to that illustrated on Tavernier's own advertisement. A reproduction of the original instructions supplied by Tavernier for such astronomical keys, is published by Mathieu Planchon in Musée rétrospectif de la Class 96, Horlogerie à l'Exposition Universelle Internationale de 1900 à Paris, p. 141, pl. CXVIII bis.