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Perpetual calendarIts intricate mechanism harbours the memory of time to come...In 1853, watchmakers invented this prodigious movement, a real mechanical memory. On the month mechanism, which makes one revolution per year, a small satellite toothed wheel makes one complete revolution over a period of 4 years. Thanks to this cam, the movement automatically indicates the day, the month, the date and the moon phase - with no manual intervention even during leap years. |
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Satellite wheelJust as the Earth has the Moon for a satellite, the satellite wheel rotates about its own axis, even as it rests on a turning wheel. |
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Leap yearsThis satellite wheel makes one rotation every four years: for three years, nothing happens, but every fourth year, the mechanism displays the 29th of February and switches directly to the 1st of March. |
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Mechanical memoryRaised to a certain level, watchmaking is a complete art that goes very far indeed, even going so far as to hold memories of the future. |
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