Greubel Forsey Tourbillon 24 Secondes Contemporain with Natural Titanium Movement (In 5N Red Gold or White Gold Case)

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 their hand-wound tourbillon 24 seconds movement by incorporating natural grey titanium main plates. The tourbillon cage bridges are also made from Titanium.

Technical details

Tourbillon 24 Secondes Contemporain
Natural titanium movement
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

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