Patek Philippe · Automatic

240 LU CL C

The calibre 240 micro-rotor base carrying the Celestial's astronomical display: three sapphire discs turning at their own rates to show the night sky over the northern hemisphere as seen from the latitude of Geneva, the moon's orbital position and its phases. A separate reading gives the time of the meridian passage of Sirius and of the moon. 315 parts, and still under seven millimetres thick.