Greubel Forsey Tourbillon 24 Secondes in Platinum

Greubel Forsey presents a platinum version of the Tourbillon 24 Secondes watch.

Patented in 2004, the Tourbillon 24 Secondes Incliné (T24Si) is the Swiss luxury watch atelier’s third fundamental invention and continues the exploration into minimising the effects of gravity on the regulating organ. This is achieved in the T24Si by means of an innovative tourbillon cage undergoing rapidly changing positions with a high angular velocity.

Greubel Forsey Tourbillon 24 Secondes in Platinum

After launching white gold and red gold versions, Greubel Forsey has created the Tourbillon 24 Secondes platinum variant featuring an anthracite black gold dial.

Greubel Forsey Tourbillon 24 Secondes in Platinum

Measuring 43.50mm in diameter, the case is fitted with asymmetrical convex synthetic sapphire crystal glasses on the front and case-back side.

The Greubel Forsey Tourbillon 24 Secondes watch is also available in red gold and white gold versions.

Technical details

Model: Greubel Forsey Tourbillon 24 Secondes in Platinum

Movement specifications

Hand-wound movement with patented tourbillon
Tourbillon 24 Secondes
Hours and minutes
Small seconds
24-seconds tourbillon rotation
Power-reserve indication

Movement dimensions
• Diameter: 36.40 mm
• Thickness: 9.35 mm

Number of parts
• Movement: 277 parts
• Tourbillon cage: 88 parts
• Weight of the cage: 0.39 g

Number of jewels
• 36
• Olived-domed jewels in gold chatons

Chronometric power reserve
• 72 hours

Barrels
• Two 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
• Nickel silver, spotted and snailed, with polished bevelling and countersinks, straight-grained flanks, nickel-palladium treatment

Bridges
• Nickel silver, frosted and spotted, with polished bevelling and countersinks, straight-grained flanks, nickel-palladium treatment
• 3 engraved gold plates (1x Greubel Forsey, 1x individual number, 1x name of the invention)
• Flat black polished steel tourbillon bridge
• Black PVD-coated titanium platform under the tourbillon and polished backdrop

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 on a sector
72-hours power reserve on a sector
24-seconds tourbillon rotation

Exterior

Case
In platinum 950 with asymmetrical convex synthetic sapphire crystal
Diameter: 43.50 mm
Height: 16.11 mm
Transparent back with asymmetrical convex synthetic sapphire crystal
Lateral window with shaped synthetic sapphire crystal
Three-dimensional, variable geometry-shaped lugs
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
Hand-engraved individual number
Water resistance of the case: 3 atm – 30 m – 100 ft (standard NIHS 92-20/SN ISO 22810:2010)
Crown: In platinum 950 with engraved and black lacquered GF logo

Dial
Multi-level in gold, anthracite colour
Gold hour markers
Gold display sectors
Relief-engraved zone of text
Gold plate engraved with the individual number of the timepiece
Gold GF logo

Hands
Hours and minutes in gold with Super-LumiNova, small seconds and power-reserve in polished gold
24-seconds double-tipped hand, black anodised aluminium

Strap and clasp
Hand-sewn alligator
Platinum 950 folding clasp, hand-engraved with the GF logo