Greubel Forsey Double Tourbillon 30° “Edition Historique” Limited Edition
Since the launch of the Double Tourbillon 30° in 2004, Swiss luxury watch maker Greubel Forsey has released 3 lines based on this invention, namely : Contemporaine (which includes Vision and Secret models), Invention (which includes the Invention Piece 1 model) and Technique (the Double Tourbillon 30° Technique model). This year Greubel Forsey decided to end the Double Tourbillon 30° Contemporaine series by creating the Edition Historique.
This Edition Historique series includes 11 pieces in 5N red gold, and 11 pieces in platinum. The decision to cease the Double Tourbillon 30° Contemporaine after six successful years will also see Greubel Forsey channelling new energy in creating systems, inventions and to explore new avenues.
The complexity of this timepiece is not only limited to the tourbillon system, but is visible in other aspects including a new kind of dial. This exclusive gold dial integrates three sapphire-crystal plates. These complex insertions are engraved and enhanced by a 3D structured text.
The bezel with beveled relief gives an original look to this final edition, a new interpretation of the style of the earlier models while retaining the intrinsic design features of a Greubel Forsey timepiece.
Like the other Greubel Forsey timepieces, the Double Tourbillon 30° expresses the thinking of its creators. Visually, you will also discover the 3D structured text on the dial and engraved hand-decorated curved plates affixed to the sides of the case extolling the philosophy and skill of the inventor watchmakers.
Invented in the early nineteenth century for the pocket watch and virtually unchanged since, the tourbillon aims to eliminate the equilibrium difference of the balance spring caused by gravity. However, since the beginning of their adventure together, the inventor watchmakers Robert Greubel and Stephen Forsey have always sought to exceed the achievements of watchmaking science, going further in the complexity and research to effectively improve the operation of the wristwatch.
They developed a tourbillon caged within a second cage, so that this new complication will permanently cancel the rate errors due to gravity, taking account of all the usual positions of a wristwatch.
Called the Double Tourbillon 30°, precisely because of the angle that connects the two rotating cages, this patented system provides a decisive technological progress and marks a milestone in the history of watch-making.
Technical details
Model: Greubel Forsey Double Tourbillon 30° “Edition Historique” in 5N red gold
Movement
Double Tourbillon 30°, Hours and minutes display, Outer Tourbillon 4-minute rotation indicator, Inner Tourbillon 60-Second rotation indicator, power-reserve indicator
Dimensions: • Diameter : 36.40 mm • Thickness : 9.65 mm
Number of parts: Complete movement : 303 parts/ 2 Tourbillon cages : 130 parts/ Weight of the two cages : 1.17 g
Number of jewels: 39 jewels, Olive-domed jewels in gold chatons
Power reserve 72 hours
Barrels: Rapid rotating twin barrels (1 Turn in 3.2 hours), one of which equipped with a slipping spring so as to avoid excess tension
Balance wheel: Variable-inertia with 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 circular graining and hand-bevelled, finished in “Nickel Palladium”
Bridges: Nickel silver frosted and hand-bevelled, finished in “Nickel Palladium”
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, Gold counterweight
Displays
Hours and minutes
Small seconds
4-minute Outer Tourbillon rotation indicator
72-hour power reserve on a sector
Case
In 18k 5N red gold with convex sapphire crystal
Transparent back with convex 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
Four 5N red gold ingraved plates bearing text screwed to the caseband
Hand-engraved individual number on the caseback
Case dimensions : Diameter : 44.50 mm plates included, 43.50 on bezel • Thickness : 16.11 mm
Water resistance of the case: 3 ATM – 30 M – 100 FT
Crown: 5N red gold with engraved and black lacquered GF logo
Dial
18k gold dial, anthracite colour
Sapphire-crystal plates with 3D structured text
Hour markers in gold
Gold plate with the individual number
Gold security screws
Hands
Hours, minutes, small seconds, and power reserve in polished gold
Sapphire 4-minute engraved indicator
Strap and clasp
Hand-sewn black alligator. 18k 5N red gold folding clasp, hand-engraved with the Greubel Forsey logo
Edition
Unique edition of 11 pieces in 5N red gold numbered from 165 to 175
Model: Greubel Forsey Double Tourbillon 30° “Edition Historique” in Platinum
Movement
Double Tourbillon 30°, Hours and minutes display, Outer Tourbillon 4-minute rotation indicator, Inner Tourbillon 60-Second rotation indicator, power-reserve indicator
Dimensions: Diameter : 36.40 mm
Thickness : 9.65 mm
Number of parts: Complete movement : 303 parts/ 2 Tourbillon cages : 130 parts
Weight of the two cages : 1.17 g
Number of jewels : 39 jewels, Olive-domed jewels in gold chatons
Power reserve: 72 hours
Barrels: Rapid rotating twin barrels (1 Turn in 3.2 hours), one of which equipped with a slipping spring so as to avoid excess tension
Balance wheel: Variable-inertia with 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 circular graining and hand-bevelled, finished in “Nickel Palladium”
Bridges: Nickel silver frosted and hand-bevelled, finished in “Nickel Palladium”
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, Gold counterweight
Displays
Hours and minutes
Small seconds
4-minute Outer Tourbillon rotation indicator
72-hour power reserve on a sector
Exterior
Case
In platinum 950 with convex sapphire crystal
Transparent back with convex 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
Four platinum engraved plates bearing text screwed to the caseband
Hand-engraved individual number on the caseback
Case diameter : 44.50 mm plates included, 43.50 on bezel
Thickness : 16.11 mm
Water resistance of the case: 3 ATM – 30 M – 100 FT
Crown: Platinum with engraved and black lacquered GF logo
Dial
18k gold dial, anthracite colour
Sapphire-crystal plates with 3D structured text
Hour markers in gold
Gold plate with the individual number
Gold security screws
Hands
• Hours, minutes, small seconds, and power reserve in polished gold
• Sapphire 4-minute engraved indicator
Strap and clasp
Hand-sewn black alligator. Platinum folding clasp, hand-engraved with the Greubel Forsey logo
Edition
Unique edition of 11 pieces in platinum numbered from 176 to 186
