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
转自网络 |
发表于 2011-1-22 22:07
发表于 2011-1-22 22:29
楼主
