The Patek Philippe watch boasts a self-winding mechanical movement, Caliber 240 LU CL C, featuring a date indication by hand and displaying hours and minutes of mean solar time. It showcases a sophisticated sky chart detailing the phases and orbit of the Moon, as well as the meridian passage times for Sirius and the Moon. The dial is adorned with three metalized sapphire-crystal discs and an ellipse framing Geneva’s visible sky. Housed in a platinum case with a diameter of 44 mm and a height of 10.58 mm, it is water-resistant to 30 meters and includes a sapphire crystal case back. The watch is complemented by a shiny navy blue alligator strap with square scales, hand-stitched, and secured with a fold-over clasp.