Watches + Dictionary = Watchionary
Triple-axis tourbillons
Girard-Perregaux Tri-Axial Planetarium,
Triple-axis tourbillons

A tourbillon with many axes of rotation is one in which the escapement is positioned in a cage. A tourbillon that spins on three separate axes is called a triple-axis tourbillon (sometimes, it’s called a tri-axial tourbillon).

AD Banned GMT