Jacob & Co. Astronomia Solar a one-of-one unique execution of the Astronomia Solar. This piece features a 43.4mm 18K rose gold case fully glazed in sapphire, exposing a multi-axis structure visible from nearly all directions.

The display is driven by a three-arm vertical carriage completing a full clockwise rotation every 10 minutes. One arm carries the off-centered time display with blued hands and Roman numeral quarter markers, mechanically counter-rotated to remain upright throughout the orbit. A second arm supports a double-axis flying tourbillon, rotating once per minute while simultaneously traveling around the dial. The third arm carries a magnesium Earth, turning once every 60 seconds. Below, a rotating aventurine baseplate turns counterclockwise every 10 minutes. star field. Scattered around the watch’s face are additional gemstones, used as planetary markers that emphasize the solar system layout. At the center is a Jacob-cut® citrine that serves as a fixed sun, crowning the entire universe of motion and rotating complications.

This is an unworn Jacob & Co. Astronomia Solar 18K Rose Gold Watch AS310.40.SP.ZK.A. It is accompanied by papers and a travel watch case.