Greubel Forsey Quadruple Tourbillon Blue Limited Edition

High-end Swiss horology atelier Greubel Forsey presents new blue dial version of its Quadruple Tourbillon watch. This timepiece is available in a platinum or an 18K red gold case.

Greubel Forsey Quadruple Tourbillon Blue Limited Edition

Both models feature blue finished multi-level dial in gold. The hand-wound movement drives the patented quadruple tourbillon, hours and minute hands, small seconds, and power reserve indication.

Greubel Forsey Quadruple Tourbillon Blue Limited Edition Red Gold

Made of platinum 950 or 18k 5N red gold, the 43.5mm diameter case is fitted on a hand-sewn alligator strap secured with a precious metal folding clasp.

Greubel Forsey Quadruple Tourbillon Blue Limited Edition in Platinum

The mechanical manual-winding movement with 63 jewels and two series-coupled fast rotating barrels provides a power reserve of 50 hours. The inner tourbillons complete one rotation per minute and the outer tourbillions in 4 minutes.

Greubel Forsey Quadruple Tourbillon Blue Limited Edition red gold

The new Quadruple Tourbillon Blue watch by Greubel Forsey is available in a limited edition of 8 pieces in platinum and 8 pieces in 5N red gold.

Technical details

Movement specifications

Movement dimensions
Diameter: 36.40 mm
Thickness: 9.70 mm

Number of parts
Movement: 534 parts
4 tourbillon cages: 261 parts
Total weight of the cages: 2.26 g
Spherical differential: 28 parts

Number of jewels
63, Olived-domed jewels in gold chatons

Chronometric power reserve
50 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 white gold mean-time screws (10.70 mm diameter)

Frequency
• 21’600 vibrations/hour

Balance spring
• Phillips terminal curve
• Geneva-style stud

Main plates
• Nickel silver, spotted with polished bevelling and countersinks, straight-grained flanks, nickel-palladium treatment or black chrome treatment

Bridges
• Nickel silver, frosted and spotted with polished bevelling and countersinks, straight-grained flanks, nickel-palladium treatment
• Two engraved gold plates, one with the individual number and one with the text “Greubel Forsey”
• Four flat black polished and barrel-polished steel tourbillon bridges, hand-polished bevelling and countersinks

Inner tourbillons
• Inclined at a 30° angle, 1 rotation per minute

Outer tourbillons
• 1 rotation in 4 minutes
• Hand-bevelled and openworked cage pillars
• 1 gold counterweight per double cage bearing the individual number of the timepiece

Gearing
• Involute circle profile
• Conical gearing with profiled teeth

Displays
• Hours and minutes
• Small seconds (mean performance)
• 50-hours power reserve on a sector
• 240-seconds outer-tourbillon rotation (on one of the outer cages)

Exterior

Case
In platinum 950 or in 18k 5N red gold with asymmetrical convex synthetic sapphire crystal
Transparent back with asymmetrical convex synthetic sapphire crystal
Lateral window with shaped synthetic sapphire crystal
Three-dimensional, variable geometry-shaped lugs
Raised polished engraving “Quadruple” and “Greubel Forsey” on a hand-punched background
Gold security screws
Polished bezel, caseband with hand-finished straight graining
Hand-engraved individual number
Diameter: 43.50 mm
Height: 16.11 mm
Water resistance of the case: 3 atm – 30 m – 100 ft (standard NIHS 92-20/SN ISO 22810:2010)
Crown: In platinum 950 or in 18k 5N red gold with engraved and black-lacquered GF logo

Dial
Multi-level in gold, blue finish (polished)
Hand matt lapped gold indicators

Hands
Hours and minutes in polished gold, with Super-LumiNova
Small seconds, 240-seconds and power-reserve in polished gold

Strap and clasp
Hand-sewn alligator
Platinum 950 or 18k 5N red gold folding clasp, hand-engraved with the GF logo

Limited edition
8 pieces in platinum and 8 pieces in 5N red gold