Greubel Forsey has launched a new version of its Tourbillon 24 Secondes Contemporain watch. Available in 5N red gold or white gold case, this new edition houses a titanium movement.
For this edition, Greubel Forsey has created a new version of the hand-wound tourbillon 24 seconds movement by incorporating natural grey titanium main-plates. The tourbillon cage bridges are also made from titanium.
The watch indicates the hour and minutes with two spear-headed hands positioned centrally. The small seconds dial near the 9 o’ clock has a red triangular hand. the power reserve display is placed at the right sector of the dial.
Measuring 44.50 mm diameter, the 18K gold case of the Greubel Forsey Tourbillon 24 Secondes Contemporain watch is fitted on a hand-sewn alligator alligator strap.
Technical details
Model: Greubel Forsey Tourbillon 24 Secondes Contemporain
With natural titanium movement
Case in 5N red gold or in white gold
Movement
Hand-wound movement with patented tourbillon
Tourbillon 24 Secondes • hours and minutes • small seconds • 24-seconds tourbillon rotation • power-reserve
Movement dimensions
• Diameter: 36.40 mm
• Thickness: 10.85 mm
Number of parts
• Movement: 366 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 and countersinks
Bridges
• Nickel silver, frosted and spotted, with polished bevelling and countersinks, straight-grained flanks, anthracite 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 white gold with convex synthetic sapphire crystal
• Transparent back with 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 white gold plates, engraved, hand-finished with text, screwed to the caseband
• Hand-engraved individual number
• Diameter: 44.50 mm
• Height: 15.20 mm
• Water-resistant 3 atm – 30 m – 100 ft (standard NIHS 92-20/SN ISO 22810:2010)
Crown
• In 18k 5N red gold or white gold with engraved and black lacquered GF logo
Dial side
• Multi-level synthetic sapphire hour-ring, galvanic growth hour indexes with SuperLumiNova, engraved and lacquered minute-circle
• Gold “12” index with Super-LumiNova
• Tourbillon rotation, small seconds and power-reserve indicators in gold
Hands
• Hours and minutes in polished gold, with Super-LumiNova
• Small seconds (red triangle)
• Power-reserve in black treated steel
• 24-seconds double-tipped hand, black anodised aluminium
Strap and clasp
• Hand-sewn alligator
• 18k 5N red gold or white gold folding clasp, hand-engraved with the GF logo
