DeLaCour Bitourbillon

Calibre DC297. Flying bi-tourbillon driven by a differential to maintain a constant force. The differential allows the equalization of the function of the two tourbillons and improves the precision.Indication of the hour and second time zone with instantaneous change. Indication of the moon phase with a mechanism that shows a shooting star passing furtively every 6 minutes in front of the moon phase. Power reserve 50 hours. Creation: Pierre Koukjian.

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