Greubel Forsey Tourbillon Cardan.
TECHNICAL DETAILS
Tourbillon Cardan
In titanium
Hand-wound movement with patented Cardan Tourbillon
Cardan Tourbillon • hours and minutes • small seconds • power-reserve
Movement
Movement dimensions
•Overall diameter: 39.60 mm
•Thickness: 13.53 mm
Number of parts
•Movement: 389 parts
•Cardan tourbillon cages: 98 parts
•Weight of the cage: 0.92 g
Number of jewels
•49
•Olived-domed jewels in gold chatons
Chronometric power reserve
•80 hours
Barrels
•Four coaxial series-coupled fast-rotating barrels (1turn in 2.7 hours), one of which is equipped with aslipping spring to avoid excess tension
•Relief-engraved text, circular-grained, blacktreatment, polished chamfer
Balance wheel
•In-house variable-inertia with 6 gold mean-timescrews(12.60 mm diameter)
Frequency
•21’600 vibrations/hour
Balance spring
•Phillips terminal curve
•Geneva-style stud
Bridges and main plates
•Titanium and nickel silver, frosted and spotted,polished bevelling and countersinks, straight-grainedflanks
•Hand-bevelled and openworked cage pillars
Movement side
•Flat black polished steel tourbillon bridge, polishedbevelling and countersinks
•Gold plate engraved with the individual number,circular-grained, polished bevelling, straight-grainedflanks
Cardan Tourbillon
•Ultra-fast inner tourbillon cage (1 rotation in 16seconds) in titanium, barrel-polished and hand-bevelled, inclined at a 30° angle with gold counterweight
•Outer flying Cardan cages, 48-seconds cycle, doublevariable tilt at 30°, polished and hand-bevelled,straight-grained flanks
Gearing
•Involute circle profile
•Conical gearing with profiled teeth
Displays
•Hours and minutes
•Small seconds
•Power reserve on a sector
Exterior
Case
•Titanium with high domed synthetic sapphire crystal
•Transparent back with high domed syntheticsapphire crystal
•Hand-polished bezel, caseband with hand-finishedstraight graining
•Titanium security screws
•Raised polished engraving “Tourbillon Cardan” and“Greubel Forsey” on a hand-punched background
Case dimensions
•Caseband diameter: 45.50 mm
•Bezel diameter: 46.00 mm
•Case height: 13.81 mm
•Height on synthetic sapphire crystals: 18.15 mm
Water resistance of the case
•Water-resistant 3 atm - 30 m - 100 ft
(standard NIHS 92-20/SN ISO 22810:2010)
Crown
•Titanium, polished, with GF logo
Dial side
•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
Hands
•Hours and minutes in polished steel, with Super-LumiNova
•Small seconds and power-reserve in polished steel,hand-polished countersink, flat black polished head
Strap and clasp
•Non-animal material, hand-sewn
•Titanium folding clasp, engraved GF logo
Ссылка на обзор на русском.