An astronomical complication reads the sky rather than the clock. This one charts the night sky across a multi-layered display and adds the times of sunrise and sunset to the moon phase — figures that shift daily and must be encoded mechanically for a single latitude, which is why an astronomical watch is built for a place as much as for a person. The 47mm white gold case carries no lugs, the strap meeting the case directly, which is what lets a movement of this depth sit as it does. What matters on examination: that the celestial and calendar indications track correctly against a known date; that the sky chart corresponds to the latitude the piece was built for; and that any service was carried out by a maker qualified on astronomical work. Delivery-set completeness is confirmed through the desk. Maker: Patek Philippe. Reference: 6105G-001. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request.