{"lien_WSTV":"","tax_name":"deprecated","tax_rate":20,"id_manufacturer":"0","id_supplier":"0","id_category_default":"363","id_shop_default":"1","manufacturer_name":false,"supplier_name":false,"name":"Vision","description":"<p><strong>The Magic of the Double tourbillon 30\u00b0<br \/><br \/>A noble invention<\/strong><br \/><br \/>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.<br \/><br \/>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.<br \/><br \/><strong>Technical visibility<br \/><\/strong><br \/>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\u2019clock. Visually representing the rotation of the inner cage of the Double Tourbillon 30\u00b0, the small seconds appear on a small dial at 9 o\u2019clock, 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.<br \/><br \/><strong>An architectural signature<\/strong><br \/><br \/>The case of the Double Tourbillon 30\u00b0 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\u2019s and Stephen Forsey\u2019s 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.<br \/><br \/><strong>The art of hand-crafted details<\/strong><br \/><br \/>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\u00b0 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.<br \/><br \/><strong>From the pocket to the wrist...<\/strong><br \/><br \/><strong>200 years earlier<\/strong><br \/><br \/>\u201cGive me the perfect oil, and I will give you the perfect watch,\u201d said Abraham Louis Breguet, the watchmaker from Neuch\u00e2tel who invented the Tourbillon regulator and who lived in Paris during the Age of Enlightenment.<br \/><br \/>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\u2019s gravity.<br \/><br \/>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.<br \/><br \/><strong>The first Tourbillon created for the wrist<\/strong><br \/><br \/>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.<br \/><br \/><strong>Moving beyond existing achievements<\/strong><br \/><br \/>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.<br \/><br \/>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.<br \/><br \/>Named the Double Tourbillon 30\u00b0, 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.<br \/><br \/><strong>Eliminating the flaw in equilibrium...<\/strong><br \/><br \/><strong>A revolution within a revolution<\/strong><br \/><br \/>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.<br \/><br \/>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\u2019s gravity pull is no longer limited to the vertical position.<br \/><br \/><strong>Optimal chronometric performance<\/strong><br \/><br \/>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\u2019s rapid rotational speed of four minutes gives ideal mobility to the balance wheel by avoiding prolonged exposure to the earth\u2019s 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\u00b0 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.<br \/><br \/><strong>High-performance gearing<\/strong><br \/><br \/>A conical gearing, composed of a wheel and a pinion, with profiled teeth specifically made for the Double Tourbillon 30\u00b0, was chosen so as to enable an improved power transmission, superior to that of classical solutions.<br \/><br \/>The architecture of this movement within a diameter of 36.4mm is entirely dedicated to the presentation of the Double Tourbillon 30\u00b0. 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 \u201cjade gold\u201d 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. 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{"Compl\u00e9ment":"White gold case","Statut de vente":"En vente depuis","Date":"2011","Pi\u00e8ce unique":"No","S\u00e9rie limit\u00e9e":"No","Sexe":"Homme","Gaucher":"No","Diam\u00e8tre":"43.5","Epaisseur":"15.76","Types":"Hand-winding","Styles":"Atypical, High Horology","Calibre_autre":"GF 02","Affichage":"Hands","Complication":"Tourbillon, 4-Minute Indicator, Power Reserve Indicator","Mati\u00e8re du bo\u00eetier":"White gold","Particularit\u00e9 du boitier":"Sapphire caseback","Particularit\u00e9 du boitier_autre":"Crown gold or platinum with engraved and black lacquered GF logo","Etanch\u00e9it\u00e9":"30 meters","Forme":"Round","Cadran":"Gold","Couleur du cadran":"Black","Index":"Roman numerals, Baton-type","Mati\u00e8re du bracelet":"Alligator leather","Fermeture du bracelet":"Folding buckle ","Couleur du bracelet":"Black","Plus de caract\u00e9ristiques":"30 \u00b0 inclined Double Tourbillon<br \/>Outer Tourbillon 4-minute rotation indicator<br \/>Inner Tourbillon 60-second rotation indicator<br \/><br \/>Movement<br \/>301 parts<div>2 Tourbillon cages : 128 parts<div>Weight of the two cages : 1.17 g<\/div><div>39 jewels<br \/>Olive-domed jewels in gold chatons<\/div><div>Power reserve : 72 hours<\/div><div><div>Frequency :<\/div><div>21 600 vibrations\/hour<\/div><\/div><div>Rapid rotating twin barrels one of which equipped with a slipping spring so as to avoid excess tension<br \/><\/div><div>Balance wheel free sprung balance with white gold mean-time screws<\/div><div>Main Plates in nickel silver with fine circular graining centred around the Tourbillon. finished in \u201cjade gold\u201d<\/div><div>Bridges Hand-Frosted nickel silver. finished in \u00abjade gold\u00bb<\/div><div>Involute circle profile<\/div><div>Conical gearing with corrected profile<\/div><div>Inner Tourbillon<\/div><div>Outer Tourbillon<\/div><div><br \/>Raised polished engraving of the name of the Invention on a hand-punched background<\/div><div>Gold security screws<\/div>Spiral of infinity hand-engraved around the periphery of the case<br \/><div>Three-dimensional lugs secured<\/div><div>Hand-engraved individual number<br \/><br \/><\/div><div>Hand-sewn strap<\/div><div>Folding clasp engraved with the Greubel Forsey logo<\/div><\/div>"}

Vision

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

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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 white gold case (with black gold dial) 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 :	White 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 :	White 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.