Movement
Movement dimensions
Diameter : 36.40 mm
Tickness : 10.85 mm
Number of parts
Movement : 365 parts
Tourbillon cage : 88 parts
Weight of the cage : 0.38 g
Number of jewels
40
Olived-domed jewels in gold chatons
Chronometric Power Reserve
72 hours
Barrels
Two coaxial series-coupled fast rotating barrels (1 turn in 3.2 hours), one of which is equipped with a slipping spring to avoid excess tension
Balance wheel
Variable-inertia with gold mean-time screws (10 mm diameter)
Frequency
21'600 vibrations/hour
Balance spring
Phillips terminal curve
Geneva-style stud
Main plates
Titanium, frosted and spotted, with polished bevelling, royal blue treatment
Bridges
Nickel silver, frosted and spotted with polished bevelling and countersinks, straight-grained flanks, nickel-palladium treatment
1 gold plate engraved with the individual number
Synthetic sapphire tourbillon bridge
Tourbillon
Inclined at a 25° angle, 24-seconds rotation
Light alloy cage pillars
Titanium cage bridges
Gold counterweight
Gearing
Involute circle profile
Tangential inclined gear on fixed wheel and profiled teeth on escape wheel pinion
Displays
Hours and minutes
Small seconds
72-hours power reserve on a sector
24-seconds tourbillon rotation
Exterior
Case
In 18k 5N red gold or platinum 950 with convex synthetic sapphire crystal
Transparent back with asymmetrical convex synthetic sapphire crystal
Three-dimensional, variable geometry-shaped lugs, screwed fixing
Raised polished engraving "Tourbillon 24" Incliné" and "Greubel Forsey" on a hand-punched background
Gold security screws
Hand-polished bezel, caseband with hand-finished straight graining
Two 18k 5N red gold or platinum plates, engraved, hand-finished with text, screwed to the caseband
Hand-engraved individual number
Case dimensions
Diameter : 44.50 mm
Tickness : 15.20 mm
Water resistance of case
Water-resistant 3 atm - 30 m - 100 ft
(Standard NIHS 92-20/SN ISO 22810:2010)
Crown
In 18k 5N red gold or in platinum 950 with engraved and black-lacquered GF logo
Hands
Hours and minutes in polished gold, with Super-LumiNova
Small seconds (red triangle)
Power-reserve in polished gold
24-seconds double-tipped hand, black anodised aluminium
Strap and clasp
Hand-sewn alligator
18k 5N red gold or platinum 950 folding clasp, hand-engraved with the GF logo
Dial side
Multi-level synthetic sapphire hour-ring, galvanic growth hour indexes with Super-LumiNova, engraved and lacquered minute-circle
Gold "12" index with Super-LumiNova
Tourbillon rotation, small seconds and power-reserve indicators in gold | 
