Lot Essay
The watch key with calendar and phases of the moon was invented by the renowned watchmaker Etienne Tavernier (1756-1839) in Paris who also worked closely with Abraham Louis Breguet.
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UNSIGNED, CIRCA 1810
Details
Anon. An 18K pink gold astronomical dual dial key with calendar and phases of the moon
Unsigned, circa 1810
The white enamel dial with Arabic date indication, days of the week, symbols of sun, moon, venus, mercury, mars, jupiter and saturn, the reverse with an aperture for the phases of the moon with lunar calendar, the functions set by depressing a small lever in the band while inserting the key in the winding square of a watch, unsigned
24 mm. diam.
Unsigned, circa 1810
The white enamel dial with Arabic date indication, days of the week, symbols of sun, moon, venus, mercury, mars, jupiter and saturn, the reverse with an aperture for the phases of the moon with lunar calendar, the functions set by depressing a small lever in the band while inserting the key in the winding square of a watch, unsigned
24 mm. diam.