Independents

Double Tourbillon 30° Technique

in platinum

mechanical hand-wound movement, Calibre GF02 s

Double Tourbillon 30° • hour and minute display • outer tourbillon 4-minute rotation indicator

inner tourbillon 60-second rotation indicator • power-reserve indicator.

Movement with patented tourbillon

Movement dimensions

• Diameter: 38.40 mm

• Thickness: 12.15 mm

Number of parts

• Complete movement: 385 parts

• 2 tourbillon cages: 130 parts

• Weight of the two cages: 1.22 g

Number of jewels

• 43

• Olive-domed jewels in gold chatons

Power reserve

120 hours

Barrels

• Four 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

• Gold black chrome fi nished cover with relief engraving

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, frosted with polished bevelling, nickel-palladium finish

Bridges

Nickel silver, frosted, spotted with polished bevelling, nickel-palladium finish, gold nameplate bearing the individual number

Gearing

• Involute circle profile

• Conical gearing with corrected profile

Inner Tourbillon

Inclined at a 30° angle, 1 rotation per minute

Outer Tourbillon

• 1 rotation in 4 minutes

• Hand-bevelled and openworked cage pillars

• Solid gold counterweight

Displays

• Hour and minute

• Small second

• 120-hour power reserve on a sector

• 4-minute outer tourbillon rotation indicator

Exterior

Case

• In platinum 950 with convex sapphire crystal

• Transparent back with sapphire crystal

• Raised polished engraving of the name of the Invention on a hand-punched background

• Gold security screws

• Three-dimensional, variable geometry-shaped lugs secured with screws

• 2 platinum engraved and hand-finished plates bearing text screwed to the caseband

• Hand-engraved individual number

Case dimensions

• Diameter: 47.50 mm

• Thickness: 16.84 mm

Water resistance of the case

3 atm - 30 m - 100 ft

Crown

Platinum with engraved and black

lacquered GF logo

Dial

• Sapphire crystal hour-ring

• Small second and power-reserve indicators in gold

Hands

• Hour and minute in gold, black chrome finish

• Small second, power reserve (red triangles)

• Sapphire crystal 4-minute engraved indicator

Strap and clasp

• Hand-sewn black, alligator

• Platinum 950 folding clasp, hand-engraved with the Greubel Forsey logo

Press Release