Greubel Forsey Double Tourbillion

Hand-winding movement, Calibre GF 02. Double Tourbillon 30?, Exterior Tourbillon rotating cycle of 4 minutes, Interior Tourbillon rotating cycle of 1 minute, Power Reserve indicator. Movement dimension: Diameter: 36.4 mm, height: 9.65 mm. 301 components. 2 Tourbillon carriages: 128 components, weight of 2 carriages 1.17 g. Number of jewels: 39. Power reserve: 72 hours.

http://www.greubelforsey.ch/