Vision

Brand  : Greubel Forsey
Collection  : Double Tourbillon 30°
Model  : Vision
Reference  :
Complement : Red gold case
On sale : 2011

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Vision

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EDITORS REVIEW

The name "Vision" of this collection is entirely justified: the creators of this watch, Robert Greubel and Stephen Forsey, have equipped the red gold case with two domed sapphire crystal to observe the mechanism laterally.  Remarkable aesthetic detail: a spiral of infinity is finely engraved and decorated by hand on the side. 

  • Brand  : Greubel Forsey
    Collection  : Double Tourbillon 30°
    Model  : Vision
    Reference  :
    Complement : Red gold case
    On sale : 2011
    List Price : On request
    Diameter : 43.5 mm
    Thickness : 15.76 mm
    Styles : Atypical
    High Horology
    Types : Hand-winding
    Calibre : GF 02
    Complication : Tourbillon
    4-Minute Indicator
    Power Reserve Indicator
    Case material : Red gold
    Case peculiarity : Sapphire caseback
    Crown gold or platinum with engraved and black lacquered GF logo
    Shape : Round
    Water-resistance : 30 meters
    Dial : Gold
    Dial color : Black
    Display : Hands
    Indexes : Roman numerals
    Baton-type
    Strap material : Alligator leather
    Strap color : Black
    Strap clasp : Folding buckle
    + More characteristics : 30 ° inclined Double Tourbillon
    Outer Tourbillon 4-minute rotation indicator
    Inner Tourbillon 60-second rotation indicator

    Movement
    301 parts
    2 Tourbillon cages : 128 parts
    Weight of the two cages : 1.17 g
    39 jewels
    Olive-domed jewels in gold chatons
    Power reserve : 72 hours
    Frequency :
    21 600 vibrations/hour
    Rapid rotating twin barrels one of which equipped with a slipping spring so as to avoid excess tension
    Balance wheel free sprung balance with white gold mean-time screws
    Main Plates in nickel silver with fine circular graining centred around the Tourbillon. finished in “jade gold”
    Bridges Hand-Frosted nickel silver. finished in «jade gold»
    Involute circle profile
    Conical gearing with corrected profile
    Inner Tourbillon
    Outer Tourbillon

    Raised polished engraving of the name of the Invention on a hand-punched background
    Gold security screws
    Spiral of infinity hand-engraved around the periphery of the case
    Three-dimensional lugs secured
    Hand-engraved individual number

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

DESCRIPTION

  • The Magic of the Double tourbillon 30°

    A noble invention


    To facilitate the best view of the mechanical ingenuity and nobility of the new mechanism, the architecture of the movement and the dial arrangement offer an immediate and global vision of this fascinating subject, the ballet of a pair of Tourbillon cages appearing to cradle the balance system.

    One first perceives the larger of the two cages, which per forms a full rotation every four minutes. Its progress is indicated by four minute-markers placed at the centre of the bridge of the large Tourbillon. Serving as a poising weight, a tiny gold nameplate indicates the individual number of the watch. Meanwhile, the off-set escapement is clearly visible around the rim of the inner cage.

    Technical visibility

    The solid gold two-part dial gives a sense of depth to the precious metals and highlights the various watch functions. The silvered or black gold dial is held by four security screws in polished, flame-blued steel. The power-reserve is displayed on an off-centred sub-dial at 3 o’clock. Visually representing the rotation of the inner cage of the Double Tourbillon 30°, the small seconds appear on a small dial at 9 o’clock, complete with Double Tourbillon inscription. The rich and yet understated appearance of this dial expresses the technical sophistication and beauty of contemporary haute horlogerie according to Greubel Forsey.

    An architectural signature

    The case of the Double Tourbillon 30° heralds the first ever appearance of the Greubel Forsey signature. Crafted in 18-carat gold or 950 platinum and featuring an impressive 43.5mm diameter, it illustrates Robert Greubel’s and Stephen Forsey’s innovative philosophy. Its geometrically differentiated lugs are inspired by the architectural principles of perspective: depending on the angle from which they are observed, such as when viewed from above, the lugs seem slimmer than they really are.

    The art of hand-crafted details

    Finely engraved and hand-decorated on its middle with the spiral symbolising infinity, the case is fitted with two convex sapphire crystals affording a sweeping, unobstructed view of the Double Tourbillon 30° mechanism and the movement as a whole. It is held by white gold secur it y screws designed to ensure that only Greubel Forsey authorised watchmakers equipped with dedicated tools can gain access to the movement. The hand-finished raised engravings on the case-back stand out beautifully against a matt background.

    From the pocket to the wrist...

    200 years earlier

    “Give me the perfect oil, and I will give you the perfect watch,” said Abraham Louis Breguet, the watchmaker from Neuchâtel who invented the Tourbillon regulator and who lived in Paris during the Age of Enlightenment.

    Two centuries later and 50 years after the adaptation of his ingenious mechanism to a wristwatch, it is estimated that several thousand Tourbillon watches have been produced, all of them aimed at eliminating the equilibrium defect of the balance and spring caused by the pull of the earth’s gravity.

    Whilst the Tourbillon pocket watches made their mark as chronometers during the years 1850-1880, thanks to its appearance in the wristwatch the device has remained one of the most prestigious complications of haute horlogerie.

    The first Tourbillon created for the wrist

    However, with the passage of time it became essential to give a new impetus to the Tourbillon, to take a major step forward by adapting it specifically to the wristwatch whilst adhering to its principal features.

    Moving beyond existing achievements

    The watchmaker-inventors Robert Greubel and Stephen Forsey, based in their atelier in La Chaux-de-Fonds, wished to surpass the accomplishments of existing movements by plunging deeper into the subject and inventing a Tourbillon which significantly improves the functioning of a wristwatch.

    After four years of effort, they created a Tourbillon within a tourbillon, in such a way that this new complication permanently compensates the gravity-related errors of rate in all wristwatch positions.

    Named the Double Tourbillon 30°, due to the angle that links the two mobile cages, the patented double Tourbillon system is a decisive technical advance and a milestone in watchmaking history.

    Eliminating the flaw in equilibrium...

    A revolution within a revolution

    Inside an exterior Tourbillon with a diameter of around 15mm which turns in a four-minute period, an interior Tourbillon, smaller in size and inclined at 30 degrees in relation to the first cage, revolves in 60 seconds. It contains the escapement, free sprung balance system with flat hairspring and Phillips terminal curve. A mark of its sophistication is the two cages which comprise 128 elements and altogether weigh a mere 1.17 grams.

    The main characteristic of the invention, that is the 30-degree inclination of the interior cage rotation axis in relation to the rotational speed of the two Tourbillon cages, create the optimal conditions for the balance wheel to oscillate permanently in all positions: the compensation of the differences in rate due to the earth’s gravity pull is no longer limited to the vertical position.

    Optimal chronometric performance

    The choice of 30 degrees for the angle between the two turning carriages ensures a better chronometric per formance whilst maintaining a per fectly acceptable depth to the watch. Furthermore, the exterior Tourbillon’s rapid rotational speed of four minutes gives ideal mobility to the balance wheel by avoiding prolonged exposure to the earth’s gravitational pull in less favourable positions of the watch. A simple test of proof: try to place the balance wheel in a horizontal position and you will find it is simply impossible to do so! The Double Tourbillon 30° is driven by twin barrels geared in line, one of which is equipped with a slipping spring so as to avoid any defect caused by excesstension on the mechanisms during winding. It has a power reserve of at least three days, ie 72 hours.

    High-performance gearing

    A conical gearing, composed of a wheel and a pinion, with profiled teeth specifically made for the Double Tourbillon 30°, was chosen so as to enable an improved power transmission, superior to that of classical solutions.

    The architecture of this movement within a diameter of 36.4mm is entirely dedicated to the presentation of the Double Tourbillon 30°. Its unconventional construction uses two plates so as to organise the gear-trains and bridges in discrete fashion, leaving space for the rotation of the imposing cages. The plates and bridges are made of solid nickel silver, a traditional watchmaking alloy (copper, zinc and nickel), used in production of small, very high quality series, with a “jade gold” finish exclusively reser ved for Greubel Forsey. The bridges are decorated with a subtle graining and the plates are finely circled so as to enhance the movement. The domed and olived jewels are fitted into gold chatons.

  • The Magic of the Double tourbillon 30°

    A noble invention


    To facilitate the best view of the mechanical ingenuity and nobility of the new mechanism, the architecture of the movement and the dial arrangement offer an immediate and global vision of this fascinating subject, the ballet of a pair of Tourbillon cages appearing to cradle the balance system.

    One first perceives the larger of the two cages, which per forms a full rotation every four minutes. Its progress is indicated by four minute-markers placed at the centre of the bridge of the large Tourbillon. Serving as a poising weight, a tiny gold nameplate indicates the individual number of the watch. Meanwhile, the off-set escapement is clearly visible around the rim of the inner cage.

    Technical visibility

    The solid gold two-part dial gives a sense of depth to the precious metals and highlights the various watch functions. The silvered or black gold dial is held by four security screws in polished, flame-blued steel. The power-reserve is displayed on an off-centred sub-dial at 3 o’clock. Visually representing the rotation of the inner cage of the Double Tourbillon 30°, the small seconds appear on a small dial at 9 o’clock, complete with Double Tourbillon inscription. The rich and yet understated appearance of this dial expresses the technical sophistication and beauty of contemporary haute horlogerie according to Greubel Forsey.

    An architectural signature

    The case of the Double Tourbillon 30° heralds the first ever appearance of the Greubel Forsey signature. Crafted in 18-carat gold or 950 platinum and featuring an impressive 43.5mm diameter, it illustrates Robert Greubel’s and Stephen Forsey’s innovative philosophy. Its geometrically differentiated lugs are inspired by the architectural principles of perspective: depending on the angle from which they are observed, such as when viewed from above, the lugs seem slimmer than they really are.

    The art of hand-crafted details

    Finely engraved and hand-decorated on its middle with the spiral symbolising infinity, the case is fitted with two convex sapphire crystals affording a sweeping, unobstructed view of the Double Tourbillon 30° mechanism and the movement as a whole. It is held by white gold secur it y screws designed to ensure that only Greubel Forsey authorised watchmakers equipped with dedicated tools can gain access to the movement. The hand-finished raised engravings on the case-back stand out beautifully against a matt background.

    From the pocket to the wrist...

    200 years earlier

    “Give me the perfect oil, and I will give you the perfect watch,” said Abraham Louis Breguet, the watchmaker from Neuchâtel who invented the Tourbillon regulator and who lived in Paris during the Age of Enlightenment.

    Two centuries later and 50 years after the adaptation of his ingenious mechanism to a wristwatch, it is estimated that several thousand Tourbillon watches have been produced, all of them aimed at eliminating the equilibrium defect of the balance and spring caused by the pull of the earth’s gravity.

    Whilst the Tourbillon pocket watches made their mark as chronometers during the years 1850-1880, thanks to its appearance in the wristwatch the device has remained one of the most prestigious complications of haute horlogerie.

    The first Tourbillon created for the wrist

    However, with the passage of time it became essential to give a new impetus to the Tourbillon, to take a major step forward by adapting it specifically to the wristwatch whilst adhering to its principal features.

    Moving beyond existing achievements

    The watchmaker-inventors Robert Greubel and Stephen Forsey, based in their atelier in La Chaux-de-Fonds, wished to surpass the accomplishments of existing movements by plunging deeper into the subject and inventing a Tourbillon which significantly improves the functioning of a wristwatch.

    After four years of effort, they created a Tourbillon within a tourbillon, in such a way that this new complication permanently compensates the gravity-related errors of rate in all wristwatch positions.

    Named the Double Tourbillon 30°, due to the angle that links the two mobile cages, the patented double Tourbillon system is a decisive technical advance and a milestone in watchmaking history.

    Eliminating the flaw in equilibrium...

    A revolution within a revolution

    Inside an exterior Tourbillon with a diameter of around 15mm which turns in a four-minute period, an interior Tourbillon, smaller in size and inclined at 30 degrees in relation to the first cage, revolves in 60 seconds. It contains the escapement, free sprung balance system with flat hairspring and Phillips terminal curve. A mark of its sophistication is the two cages which comprise 128 elements and altogether weigh a mere 1.17 grams.

    The main characteristic of the invention, that is the 30-degree inclination of the interior cage rotation axis in relation to the rotational speed of the two Tourbillon cages, create the optimal conditions for the balance wheel to oscillate permanently in all positions: the compensation of the differences in rate due to the earth’s gravity pull is no longer limited to the vertical position.

    Optimal chronometric performance

    The choice of 30 degrees for the angle between the two turning carriages ensures a better chronometric per formance whilst maintaining a per fectly acceptable depth to the watch. Furthermore, the exterior Tourbillon’s rapid rotational speed of four minutes gives ideal mobility to the balance wheel by avoiding prolonged exposure to the earth’s gravitational pull in less favourable positions of the watch. A simple test of proof: try to place the balance wheel in a horizontal position and you will find it is simply impossible to do so! The Double Tourbillon 30° is driven by twin barrels geared in line, one of which is equipped with a slipping spring so as to avoid any defect caused by excesstension on the mechanisms during winding. It has a power reserve of at least three days, ie 72 hours.

    High-performance gearing

    A conical gearing, composed of a wheel and a pinion, with profiled teeth specifically made for the Double Tourbillon 30°, was chosen so as to enable an improved power transmission, superior to that of classical solutions.

    The architecture of this movement within a diameter of 36.4mm is entirely dedicated to the presentation of the Double Tourbillon 30°. Its unconventional construction uses two plates so as to organise the gear-trains and bridges in discrete fashion, leaving space for the rotation of the imposing cages. The plates and bridges are made of solid nickel silver, a traditional watchmaking alloy (copper, zinc and nickel), used in production of small, very high quality series, with a “jade gold” finish exclusively reser ved for Greubel Forsey. The bridges are decorated with a subtle graining and the plates are finely circled so as to enhance the movement. The domed and olived jewels are fitted into gold chatons.

  • The name "Vision" of this collection is entirely justified: the creators of this watch, Robert Greubel and Stephen Forsey, have equipped the red gold case with two domed sapphire crystal to observe the mechanism laterally.  Remarkable aesthetic detail: a spiral of infinity is finely engraved and decorated by hand on the side. 

  • Brand  : Greubel Forsey
    Collection  : Double Tourbillon 30°
    Model  : Vision
    Reference  :
    Complement : Red gold case
    On sale : 2011
    List Price : On request
    Diameter : 43.5 mm
    Thickness : 15.76 mm
    Styles : Atypical
    High Horology
    Types : Hand-winding
    Calibre : GF 02
    Complication : Tourbillon
    4-Minute Indicator
    Power Reserve Indicator
    Case material : Red gold
    Case peculiarity : Sapphire caseback
    Crown gold or platinum with engraved and black lacquered GF logo
    Shape : Round
    Water-resistance : 30 meters
    Dial : Gold
    Dial color : Black
    Display : Hands
    Indexes : Roman numerals
    Baton-type
    Strap material : Alligator leather
    Strap color : Black
    Strap clasp : Folding buckle
    More characteristics : 30 ° inclined Double Tourbillon
    Outer Tourbillon 4-minute rotation indicator
    Inner Tourbillon 60-second rotation indicator

    Movement
    301 parts
    2 Tourbillon cages : 128 parts
    Weight of the two cages : 1.17 g
    39 jewels
    Olive-domed jewels in gold chatons
    Power reserve : 72 hours
    Frequency :
    21 600 vibrations/hour
    Rapid rotating twin barrels one of which equipped with a slipping spring so as to avoid excess tension
    Balance wheel free sprung balance with white gold mean-time screws
    Main Plates in nickel silver with fine circular graining centred around the Tourbillon. finished in “jade gold”
    Bridges Hand-Frosted nickel silver. finished in «jade gold»
    Involute circle profile
    Conical gearing with corrected profile
    Inner Tourbillon
    Outer Tourbillon

    Raised polished engraving of the name of the Invention on a hand-punched background
    Gold security screws
    Spiral of infinity hand-engraved around the periphery of the case
    Three-dimensional lugs secured
    Hand-engraved individual number

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