Jacobs & Co. Astronomy
In 2016, Jacob & Co. launched the Astronomia, a revolutionary timepiece with unheard-of complications and proportions. The house of fine watchmaking and fine jewelry housed a vertically rotating movement in a 47mm gold case with a sapphire baseband and a satellite frame with four arms.

One is a biaxial tourbillon, another is a rotating dial fitted with a differential to keep it upright, one has 288 facets of Jacob's-cut diamonds representing the moon, and the fourth is a magnesium globe.

All four arms rotate on their own axes and a central axis as they orbit within the case in 20 minutes. Incidentally, this creates a third axis of rotation for the tourbillon cage.

With no crown, no central hands, the Astronomia has nothing in common with any other timepiece on earth. From the moment it took off from the Jacob & Co. launch pad, it set new standards in terms of high complications and showmanship.

Subsequent iterations and changes have sped up to 10 minutes per rotation, then 5 minutes, and a series of changes in complications, design and size.