The reproduction of the lunar cycles on the
dials of Blancpain complete calendar watches
evokes the time-honoured ties between
watchmaking and astronomy.
The face of the moon corresponding to the moon phase is visible through an opening in the dial. The moon phase indicator is made up of a wheel with 59 cogs, turning over two complete lunar cycles of 29.5 days. For this reason the moon is painted twice on the disk driven by this wheel. The moon phase mechanism is moved forward once a day around 6pm by a gear similar to that of the date indication.