Greubel Forsey Tourbillon Cardan

Case: 45.5mm diameter x 18.15mm height - titanium, hand-polished bezel, caseband with hand-finished straight graining - high domed synthetic sapphire crystal – transparent back with high domed synthetic sapphire crystal, with titanium security screws - 30m water-resistant

Dial: multi-level gold dial with openworked pillars, circular-grained with engraved and lacquered minute-circle, polished flanks – gold hour markers – small seconds and power-reserve indicators in gold, engraved and lacquered – engraved and lacquered GF logo

Movement: hand-wound movement with patented Cardan Tourbillon - 39.60mm x 13.53mm - 21,600vph - 80h chronometric power reserve - 49 jewels - 389 parts - hours, minutes, small seconds, power reserve indicator

Tourbillon: ultra-fast inner tourbillon cage (1 rotation in 16 seconds) in titanium, barrel-polished and hand-bevelled, inclined at a 30° angle with gold counterweight – outer flying Cardan cages, 48-second cycle, double variable tilt at 30°, polished and hand-bevelled, straight-grained flanks – four coaxial series-coupled fast-rotating barrels (1 turn in 2.7 hours), one of which is equipped with a slipping spring to avoid excess tension

Strap: hand-sewn from non-animal material – titanium folding clasp, engraved GF logo