During SIHH 2016, Greubel Forsey presented a new red gold version of their award winning Tourbillon 24 Secondes Vision timepiece.
Equipped with a mechanical hand wound movement featuring a patented 24-seconds tourbillon inclined at a 25° angle, this new model in 5N red gold measuring 43.50 mm diameter features a multi-level in gold dial in black-anthracite or silvered colour with engraved and “oven fired” enameled indexes and small seconds counter.
This timepiece is fitted on a hand-sewn black alligator leather strap with 18k 5N red gold pin buckle.
Technical details
Model: Greubel Forsey Tourbillon 24 Secondes Vision In 5N Red Gold
Movement
Mechanical hand-wound movement with patented tourbillon
Tourbillon 24 Secondes • hours and minutes • small seconds • power-reserve
Movement dimensions
• Diameter: 36.40 mm
• Thickness: 7.09 mm
Number of parts
• Movement: 293 parts
• Tourbillon cage: 86 parts
• Weight of the cage: 0.38 g
Number of jewels
• 41
• 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
• Black PVD-treated motor wheel with relief engraving
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, frosted and spotted, 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
• 1 engraved gold plate (individual number)
• Arched and barrel-polished steel tourbillon bridges
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 gold sector (caseback side)
Exterior
Case
• In 18k 5N red gold with convex synthetic sapphire crystal
• Transparent back with 2 convex synthetic sapphire crystals
• 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
• Diameter: 43.50 mm
• Height: case 13.65 mm (height on synthetic sapphire dome 16.03 mm)
• Water-resistant 3 atm – 30 m – 100 ft (standard NIHS 92-20/SN ISO 22810:2010)
Crown
• In 18k 5N red gold with engraved and black lacquered GF logo
Dial
• Multi-level in gold, black-anthracite or silvered colour with engraved and “oven fired” enameled indexes (émail grand feu champlevé)
• Gold GF logo
Hands
• Hours, minutes and small seconds in polished gold (black-anthracite dial) or in polished blued steel (silvered dial), hand-polished countersinks
• Power-reserve in blued polished steel
Strap and clasp
• Hand-sewn alligator
• 18k 5N red gold pin buckle, hand-engraved with the GF logo
