Invention Piece 2
| Brand : | Greubel Forsey |
| Collection : | Quadruple Tourbillon |
| Model : | Invention Piece 2 |
| Nber of pieces : | 11 |
| Complement : | Platinum |
| On sale : | 2011 |
PDF INDEX CARD
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Brand : Greubel Forsey Collection : Quadruple Tourbillon Model : Invention Piece 2 Nber of pieces : 11 Complement : Platinum On sale : 2011 List Price : On request Diameter : 43.50 mm Height : 16.28 mm Styles : High Horology Atypical Types : Hand-winding Calibre : GF03n Complication : Skeleton Tourbillon Small Seconds Power Reserve Indicator Case material : Platinum Case peculiarity : Transparent caseback Polished bezel and centre band with hand-finished straight graining Crown in platinum Shape : Round Water-resistance : 30 meters Dial : Skeleton Dial color : Grey Display : Blue triangle (Minutes) Red triangle (Hours) Sapphire hand Indexes : Arabic numerals Glass : Domed Asymmetrical Strap material : Alligator leather Strap color : Black Strap clasp : Folding buckle + More characteristics : Quadruple tourbillon
Movement
Diameter : 37.0 mm
Cage diameter : 36.40 mm
Thickness : 11.87 mm
594 composants
1 double tourbillon cage:
129 composants
Weight of one double cage: 1.17 g
64 jewels
Olived-domed jewels in gold chatons
Frequency :
21 600 vibrations/hour
Power reserve of 56 hours
Rapid rotating triple barrels (1 turn in 3.2 hours) equipped with a slipping spring to avoid excess tension
Free sprung balance with white gold mean-time screws
(10.70 mm diameter)
Balance spring :
Phillips terminal curve
Geneva-style stud
Main plates in nickel silver. spotted nickel-palladium finish. hand bevelled
Straight-grained flanks
Polished counter-sinks
Nickel silver bridge. frosted. spotted with polished bevelling. nickel-palladium finish
Gold nameplate bearing the individual number of the timepiece
4 steel Double Tourbillon bridges hand-bevelled. flat black polished with polished counter-sinks
Gearing :
Involute circle profile
Conical gearing with corrected profiles
Quadruple tourbillon
Inner tourbillon :
Inclined at a 30°angle. 1 rotation per minute
Outer tourbillon :
1 rotation in 4 minutes
Hand-bevelled and openworked cage pillars
1 gold Greubel Forsey counterweight per cage
Case
Platinium 950
Lateral window with shaped sapphire crystal
Raised engraving of the name of the Inventors on a hand-punched background
Gold security screws
Hand-engraved individual number
Crown with black lacquered GF logo
Dial
22-carat gold hour indicators with red triangle
22-carat gold Greubel Forsey initials in centre
Minute-indicator: rotating disc
Small second in fl ame-blued polished steel
Sapphire crystal 4-minute indicator
Strap
Hand-sewn
Platinium 950 folding clasp
Hand-engraved with the Greubel Forsey logo
Unique edition of 11 pieces in platinum and 11 pieces in 5N red gold
DESCRIPTION
- Greubel Forsey Invention Piece 2
In ten years, no less than six significant inventions have sprung from Greubel Forsey’s EWT think tank, three of which (to date) have been celebrated by Invention Pieces (IP). In 2007, IP1 paid homage to the Double Tourbillon 30°; in 2009, IP3 honoured the Tourbillon 24 Secondes; and today IP2 pays tribute to the Quadruple Tourbillon with a completely new architecture in which the focus is on its exclusive mechanism. The two double tourbillons systems are presented head to tail and coupled by a spherical differential. A sub-dial at 5 o'clock conceals triple mainspring barrels and features a red triangle indicating hours and a rotating disk indicates minutes. Small seconds dial at 10 o’clock and 56-hour power reserve indicator at 11 o’clock compete the dial.
A unique edition of 11 pieces in platinum and 11 in red gold.
- Greubel Forsey Invention Piece 2
In ten years, no less than six significant inventions have sprung from Greubel Forsey’s EWT think tank, three of which (to date) have been celebrated by Invention Pieces (IP). In 2007, IP1 paid homage to the Double Tourbillon 30°; in 2009, IP3 honoured the Tourbillon 24 Secondes; and today IP2 pays tribute to the Quadruple Tourbillon with a completely new architecture in which the focus is on its exclusive mechanism. The two double tourbillons systems are presented head to tail and coupled by a spherical differential. A sub-dial at 5 o'clock conceals triple mainspring barrels and features a red triangle indicating hours and a rotating disk indicates minutes. Small seconds dial at 10 o’clock and 56-hour power reserve indicator at 11 o’clock compete the dial.
A unique edition of 11 pieces in platinum and 11 in red gold.
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Brand : Greubel Forsey Collection : Quadruple Tourbillon Model : Invention Piece 2 Nber of pieces : 11 Complement : Platinum On sale : 2011 List Price : On request Diameter : 43.50 mm Height : 16.28 mm Styles : High Horology Atypical Types : Hand-winding Calibre : GF03n Complication : Skeleton Tourbillon Small Seconds Power Reserve Indicator Case material : Platinum Case peculiarity : Transparent caseback Polished bezel and centre band with hand-finished straight graining Crown in platinum Shape : Round Water-resistance : 30 meters Dial : Skeleton Dial color : Grey Display : Blue triangle (Minutes) Red triangle (Hours) Sapphire hand Indexes : Arabic numerals Glass : Domed Asymmetrical Strap material : Alligator leather Strap color : Black Strap clasp : Folding buckle More characteristics : Quadruple tourbillon
Movement
Diameter : 37.0 mm
Cage diameter : 36.40 mm
Thickness : 11.87 mm
594 composants
1 double tourbillon cage:
129 composants
Weight of one double cage: 1.17 g
64 jewels
Olived-domed jewels in gold chatons
Frequency :
21 600 vibrations/hour
Power reserve of 56 hours
Rapid rotating triple barrels (1 turn in 3.2 hours) equipped with a slipping spring to avoid excess tension
Free sprung balance with white gold mean-time screws
(10.70 mm diameter)
Balance spring :
Phillips terminal curve
Geneva-style stud
Main plates in nickel silver. spotted nickel-palladium finish. hand bevelled
Straight-grained flanks
Polished counter-sinks
Nickel silver bridge. frosted. spotted with polished bevelling. nickel-palladium finish
Gold nameplate bearing the individual number of the timepiece
4 steel Double Tourbillon bridges hand-bevelled. flat black polished with polished counter-sinks
Gearing :
Involute circle profile
Conical gearing with corrected profiles
Quadruple tourbillon
Inner tourbillon :
Inclined at a 30°angle. 1 rotation per minute
Outer tourbillon :
1 rotation in 4 minutes
Hand-bevelled and openworked cage pillars
1 gold Greubel Forsey counterweight per cage
Case
Platinium 950
Lateral window with shaped sapphire crystal
Raised engraving of the name of the Inventors on a hand-punched background
Gold security screws
Hand-engraved individual number
Crown with black lacquered GF logo
Dial
22-carat gold hour indicators with red triangle
22-carat gold Greubel Forsey initials in centre
Minute-indicator: rotating disc
Small second in fl ame-blued polished steel
Sapphire crystal 4-minute indicator
Strap
Hand-sewn
Platinium 950 folding clasp
Hand-engraved with the Greubel Forsey logo
Unique edition of 11 pieces in platinum and 11 pieces in 5N red gold