Quadruple Tourbillon

Brand  : Greubel Forsey
Collection  : Quadruple Tourbillon
Model  : Quadruple Tourbillon
Reference  :
Complement : Red gold case
On sale : 2011

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Quadruple Tourbillon

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EDITORS REVIEW

Another exceptional watch with a red gold case, signed by both artists watchmakers Robert Greubel and Stephen Forsey. Two double tourbillon cages give it its accuracy at the top.

  • Brand  : Greubel Forsey
    Collection  : Quadruple Tourbillon
    Model  : Quadruple Tourbillon
    Reference  :
    Complement : Red gold case
    On sale : 2011
    List Price : On request
    Diameter : 43.5 mm
    Thickness : 16.11 mm
    Styles : Atypical
    High Horology
    Types : Hand-winding
    Calibre : GF 03
    Complication : Small Seconds
    Power Reserve Indicator
    Case material : Red gold
    Case peculiarity : Sapphire caseback
    Shape : Asymmetrical
    Water-resistance : 30 meters
    Dial color : Black
    Display : Openworked hands
    Indexes : Roman numerals
    Baton-type
    Glass : Sapphire
    Domed
    Asymmetrical
    Strap material : Alligator leather
    Strap color : Black
    Strap clasp : Folding buckle
    + More characteristics : Quadruple Tourbillon

    Movement
    531 parts
    2 double Tourbillon cages:
    128 parts
    Weight of each double cage: 1.17 g
    Spherical differential:
    28 parts
    63 jewels
    Olive-domed jewels in gold chatons
    Power reserve : 50 hours
    Rapid rotating twin barrels equipped with a slipping spring to avoid excessive tension
    Variable-inertia balance wheel with gold mean-time screws
    Frequency :
    21 600 vibrations / hour
    Balance spring : Phillips terminal curve and Geneva-style stud
    Main plates Nickel silver. spotted nickel palladium-finish. hand bevelled. straight-grained flanks. polished counter-sinks
    Barrel bridge:nickel silver. hand bevelled and frosted. nickel palladium-finish. “Greubel Forsey” gold plate with the individual number of the timepiece
    Two steel Tourbillon bridges hand-bevelled. flat black polished with polished counter-sinks
    Two sapphire Tourbillon bridges
    Involute circle profile
    Conical gearing with corrected profile
    Inner Tourbillon
    Outer Tourbillon

    Case
    Lateral window with shaped sapphire crystal
    3 dimensional. variable geometry-shaped lugs
    Gold security screws
    Polished bezel and centre band with hand-finished straight graining
    Hand-engraved individual number
    Raised engraving of the name of the Invention on a hand-punched background
    Crown platinum with engraved and black lacquered GF logo

    Hand-sewn strap
    Folding clasp engraved with the Greubel Forsey logo

DESCRIPTION

  • Quadruple tourbillon

    Extraordinary choreography

    Thanks to this uncompromising creation, Robert Greubel and Stephen Forsey have reaffirmed themselves as authentic inventors, using the mechanical timepiece as their means of expression. The Quadruple Tourbillon à Différentiel is a blend of art and technical innovation which encapsulates the very soul of its the two creators. Transparent sapphire bridges were specifically chosen to allow unimpaired visual access to the perfectly choreographed aerial ballet of the four Tourbillons.

    Asymmetrical balance

    Robert Greubel and Stephen Forsey have engineered the four Tourbillons together in a contemporar y design, in which elegance and harmony are the dominant features. In the same spirit, and owing to the impressive number of parts which make up the movement, an asymmetrically-shaped case was chosen. The asymmetrical form was also an aesthetic tribute to the asynchronicity of the four Tourbillons. To complement the homogeneous ensemble, the displays of the small second and the power reserve dials are semi-circular. With its sophisticated coalescence of technical Invention and artistic design, the Quadruple Tourbillon à Différentiel encapsulates the best in fine watchmaking. Wearing a Quadruple Tourbillon à Différentiel is to enter the universe of Robert Greubel and Stephen Forsey, and to share, appreciate and be empathetic to the essential values emanating from their Invention.

    The mechanism

    An architectural apotheosis

    With their new Quadruple Tourbillon à Différentiel, Robert Greubel and Stephen Forsey have once again demonstrated their inventive and creative prowess and continue their ascent towards the summit of horological architecture. Greubel Forsey’s second fundamental Invention is the culmination of five years of research and development. Four separate Tourbillons are connected at the hear t of two autonomous regulating organs. Each of the two regulating organs is composed of a balance wheel oscillator placed in a cage of a first Tourbillon rotating once a minute and inclined at 30 degrees. This mechanism rotates within the cage of a second Tourbillon rotating ever y four minutes. The two oscillators, independently regulated inside the four Tourbillons, are coupled by a spherical differential which transmits their combined precision to the time display. Two barrels connected in series supply power through the spherical differential to the Tourbillons.

    The height of virtuosity

    At the heart of the Quadruple Tourbillon à Différentiel, each of the four Tourbillons make their own distinct contribution towards achieving an exceptional level of accuracy. This is due to the asynchronicity of the Tourbillons’ locations relative to each other. This ensures that it is practically impossible for the balance wheels to be in an unfavourable position, no matter which angle the watch is in. By transmitting the averaged results of two oscillators, the spherical differential doubles the chronometric performance of the two regulating organs, and also minimizes the smallest variations in the performance of the oscillators. Ample energy is assured by two large, fastrotating barrels which guarantee a power reserve of 50 hours of. The energy stored in the two barrels is transmitted equally to the two regulating organs via the spherical differential. The technological sophistication of this movement is such that it was necessar y to invent new testing instruments, and only these were able to provide the necessary information for checking and verifying the performance of the Quadruple Tourbillon. Conceived to function in three dimensions, with this Invention Robert Greubel and Stephen Forsey have created yet another another landmark Tourbillon wristwatch.

  • Quadruple tourbillon

    Extraordinary choreography

    Thanks to this uncompromising creation, Robert Greubel and Stephen Forsey have reaffirmed themselves as authentic inventors, using the mechanical timepiece as their means of expression. The Quadruple Tourbillon à Différentiel is a blend of art and technical innovation which encapsulates the very soul of its the two creators. Transparent sapphire bridges were specifically chosen to allow unimpaired visual access to the perfectly choreographed aerial ballet of the four Tourbillons.

    Asymmetrical balance

    Robert Greubel and Stephen Forsey have engineered the four Tourbillons together in a contemporar y design, in which elegance and harmony are the dominant features. In the same spirit, and owing to the impressive number of parts which make up the movement, an asymmetrically-shaped case was chosen. The asymmetrical form was also an aesthetic tribute to the asynchronicity of the four Tourbillons. To complement the homogeneous ensemble, the displays of the small second and the power reserve dials are semi-circular. With its sophisticated coalescence of technical Invention and artistic design, the Quadruple Tourbillon à Différentiel encapsulates the best in fine watchmaking. Wearing a Quadruple Tourbillon à Différentiel is to enter the universe of Robert Greubel and Stephen Forsey, and to share, appreciate and be empathetic to the essential values emanating from their Invention.

    The mechanism

    An architectural apotheosis

    With their new Quadruple Tourbillon à Différentiel, Robert Greubel and Stephen Forsey have once again demonstrated their inventive and creative prowess and continue their ascent towards the summit of horological architecture. Greubel Forsey’s second fundamental Invention is the culmination of five years of research and development. Four separate Tourbillons are connected at the hear t of two autonomous regulating organs. Each of the two regulating organs is composed of a balance wheel oscillator placed in a cage of a first Tourbillon rotating once a minute and inclined at 30 degrees. This mechanism rotates within the cage of a second Tourbillon rotating ever y four minutes. The two oscillators, independently regulated inside the four Tourbillons, are coupled by a spherical differential which transmits their combined precision to the time display. Two barrels connected in series supply power through the spherical differential to the Tourbillons.

    The height of virtuosity

    At the heart of the Quadruple Tourbillon à Différentiel, each of the four Tourbillons make their own distinct contribution towards achieving an exceptional level of accuracy. This is due to the asynchronicity of the Tourbillons’ locations relative to each other. This ensures that it is practically impossible for the balance wheels to be in an unfavourable position, no matter which angle the watch is in. By transmitting the averaged results of two oscillators, the spherical differential doubles the chronometric performance of the two regulating organs, and also minimizes the smallest variations in the performance of the oscillators. Ample energy is assured by two large, fastrotating barrels which guarantee a power reserve of 50 hours of. The energy stored in the two barrels is transmitted equally to the two regulating organs via the spherical differential. The technological sophistication of this movement is such that it was necessar y to invent new testing instruments, and only these were able to provide the necessary information for checking and verifying the performance of the Quadruple Tourbillon. Conceived to function in three dimensions, with this Invention Robert Greubel and Stephen Forsey have created yet another another landmark Tourbillon wristwatch.

  • Another exceptional watch with a red gold case, signed by both artists watchmakers Robert Greubel and Stephen Forsey. Two double tourbillon cages give it its accuracy at the top.

  • Brand  : Greubel Forsey
    Collection  : Quadruple Tourbillon
    Model  : Quadruple Tourbillon
    Reference  :
    Complement : Red gold case
    On sale : 2011
    List Price : On request
    Diameter : 43.5 mm
    Thickness : 16.11 mm
    Styles : Atypical
    High Horology
    Types : Hand-winding
    Calibre : GF 03
    Complication : Small Seconds
    Power Reserve Indicator
    Case material : Red gold
    Case peculiarity : Sapphire caseback
    Shape : Asymmetrical
    Water-resistance : 30 meters
    Dial color : Black
    Display : Openworked hands
    Indexes : Roman numerals
    Baton-type
    Glass : Sapphire
    Domed
    Asymmetrical
    Strap material : Alligator leather
    Strap color : Black
    Strap clasp : Folding buckle
    More characteristics : Quadruple Tourbillon

    Movement
    531 parts
    2 double Tourbillon cages:
    128 parts
    Weight of each double cage: 1.17 g
    Spherical differential:
    28 parts
    63 jewels
    Olive-domed jewels in gold chatons
    Power reserve : 50 hours
    Rapid rotating twin barrels equipped with a slipping spring to avoid excessive tension
    Variable-inertia balance wheel with gold mean-time screws
    Frequency :
    21 600 vibrations / hour
    Balance spring : Phillips terminal curve and Geneva-style stud
    Main plates Nickel silver. spotted nickel palladium-finish. hand bevelled. straight-grained flanks. polished counter-sinks
    Barrel bridge:nickel silver. hand bevelled and frosted. nickel palladium-finish. “Greubel Forsey” gold plate with the individual number of the timepiece
    Two steel Tourbillon bridges hand-bevelled. flat black polished with polished counter-sinks
    Two sapphire Tourbillon bridges
    Involute circle profile
    Conical gearing with corrected profile
    Inner Tourbillon
    Outer Tourbillon

    Case
    Lateral window with shaped sapphire crystal
    3 dimensional. variable geometry-shaped lugs
    Gold security screws
    Polished bezel and centre band with hand-finished straight graining
    Hand-engraved individual number
    Raised engraving of the name of the Invention on a hand-punched background
    Crown platinum with engraved and black lacquered GF logo

    Hand-sewn strap
    Folding clasp engraved with the Greubel Forsey logo