Double Tourbillon 30° Edition Historique

Since the launch of The Double Tourbillon 30° in 2004, 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). The Double Tourbillon 30° Edition Historique In the spirit of independence and exclusivity, Greubel Forsey decided in 2010 to end the Double Tourbillon 30° Contemporaine by creating two unique series, the “Edition Historique”: 11 pieces in 5N red gold, and 11 pieces in platinum.The closure of the Double Tourbillon 30° Contemporaine is a strong symbol for the brand: This line is heavily steeped in history as it is the timepiece which launched the Greubel Forsey adventure and forms the foundation of legitimacy for the inventions that followed. 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. 

  

Beyond Invention 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.

 

Creativity, technicality and craftsmanship 

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 watch-making 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.

 

 

Double Tourbillon 30° - Edition Historique - Red Gold 5NMechanical hand-wound movement, Calibre GF 02E Double Tourbillon 30°, Hours and minutes display, Outer Tourbillon 4-minute rotation indicator, Inner Tourbillon 60-Second rotation indicator, power-reserve indicator.

Unique Edition of 11 pieces in 5N red goldPatented MovementMovement dimensions
Diameter : 36.40 mm
Thickness : 9.65 mmNumber of parts
Complete movement : 303 parts
2 Tourbillon cages : 130 parts
Weight of the two cages : 1.17 g
Number of jewels 39
Olive-domed jewels in gold chatonsPower reserve 72 hoursBarrels Rapid rotating twin barrels (1 Turn in 3.2 hours), one of which equipped with a slipping spring so as to avoid excess tensionBalance wheel Variable-inertia with gold mean-time screws (10.70 mm diameter)Frequency 21'600 vibrations/hourBalance 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 minutesHand-bevelled and openworked cage pillars
Gold counterweightDisplays
Hours and minutes
Small seconds
4-minute Outer Tourbillon rotation indicator
72-hour power reserve on a sectorExterior
Case material and finishes
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 casebackUnique edition of 11 pieces in 5N red gold numbered from 165 to 175Case 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 logoDial
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
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

Double Tourbillon 30° - Edition Historique - PlatinumMechanical hand-wound movement, Calibre GF 02E Double Tourbillon 30°, Hours and minutes display, Outer Tourbillon 4-minute rotation indicator, Inner Tourbillon 60-Second rotation indicator, power-reserve indicator.
Unique Edition of 11 pieces in platinum Patented Movement
Movement dimensions
Diameter : 36.40 mm
Thickness : 9.65 mmNumber of parts
Complete movement : 303 parts
2 Tourbillon cages : 130 parts
Weight of the two cages : 1.17 g
Number of jewels : 39
Olive-domed jewels in gold chatonsPower reserve 72 hoursBarrels Rapid rotating twin barrels (1 Turn in 3.2 hours), one of which equipped with a slipping spring so as to avoid excess tensionBalance wheel Variable-inertia with gold mean-time screws (10.70 mm diameter)Frequency 21'600 vibrations/hourBalance 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 minutesHand-bevelled and openworked cage pillars
Gold counterweightDisplays
Hours and minutes
Small seconds
4-minute Outer Tourbillon rotation indicator
72-hour power reserve on a sectorExterior
Case material and finishes
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 ingraved plates bearing text screwed to the caseband
Hand-engraved individual number on the casebackUnique edition of 11 pieces in platinum numbered from 176 to 186Case dimensionsDiameter : 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 logoDial
18k gold dial, anthracite colour
Sapphire-crystal plates with 3D structured text
Hour markers in gold
Gold plate with the individual number
Gold security screwsHands 
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