This watch uses two tourbillions: The outer tourbillon rotates once every four minutes, while the inner one rotates once every 60 seconds. The complete movement numbers 304 parts, while the tourbillon cage is made up of 128 parts and weighs just 1.17 grams. Inside Information: Greubel Forsey is headquartered in La Chaux-de-Fonds, Switzerland, the center of Swiss watchmaking. Designed by the team of Robert Greubel and Stephen Forsey, this watch also comes in a “Secret” version, wherein the tourbillon is visible only from the back.
