The tourbillon black hole is a concept watch inspired by the black holes. The three rings (hours and minutes) are design like a vortex and the tourbillon escapement represent a nebula that is going to be inhaled! You can see a transparent disk with white points (stars): this is the disk of the seconds. The moving tourbillon, the stars disks, and the rotating hour rings creates a beautiful black hole effect.
Variation with hours minutes and stars position on a glass dome
AK Geneve concept watch. Hours minutes, GMT day/night indication, and power reserves.