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The Double Tourbillon 30\u00b0 is placed at the centre of a semi-circular hour and minute display, thereby visually reinforcing the link between the mechanism responsible for measuring the time and its \u201csymbolic\u201d indication.<br \/><br \/><strong>The invention at the stage centre<\/strong><br \/><br \/>In contrast to the Double Tourbillon 30\u00b0, the movement driving the Invention Piece 1 has been profoundly modified and as a consequence the double cage, shifted slightly to the left and distinctly higher. This freed up space to place the object of the invention at the very centre of the highly original hour and minute display. Two triangular indicators \u2013 a red one for the hours and a blue one for the minutes \u2013 enable the observer to follow the passing of time on the mechanism\u2019s two concentric semi-circles.<br \/><br \/>To facilitate read-off, the 12-hour and 0-minute markers are aligned at the traditional 12 o\u2019clock position.<br \/><br \/><strong>Four different rotations<\/strong><br \/><br \/>Magnificently evoking the mechanical genius of the Invention Piece 1, the various speeds of rotation of these different elements give an idea of the complexity of the mechanism: whereas the outer cage takes four minutes to perform a complete rotation and the inner cage just 60 seconds, the double hands turn in 24 hours for the hours display and two hours for minutes.<br \/><br \/>Around the Tourbillon and its indicators, the absence of a dial reveals the frosted nickel silver bridges coated with either red gold or palladium nickel and clearly visible on three distinct levels.<br \/><br \/>This opening provides a view of the concentric gearing, serving to drive the hour and minute indicators. 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{"Compl\u00e9ment":"Red gold","Statut de vente":"N est plus commercialis\u00e9","Date":"2011","Pi\u00e8ce unique":"No","S\u00e9rie limit\u00e9e":"Oui","Nombre d exemplaire":"11","Sexe":"Homme","Gaucher":"No","Diam\u00e8tre":"43.5","Epaisseur":"16.64","Types":"Hand-winding","Styles":"High Horology, Atypical","Calibre_autre":"GF 02N","Calibre distinction":"Hand-engraved","Affichage":"Hands","Affichage_autre":"Blue triangle (Minutes), Red triangle (Hours)","Complication":"Twin Rotating Tourbillons, Power Reserve Indicator","Mati\u00e8re du bo\u00eetier":"Red gold","Particularit\u00e9 du boitier":"Transparent caseback, Sapphire caseback","Etanch\u00e9it\u00e9":"30 meters","Forme":"Round","Verre":"Sapphire","Mati\u00e8re du bracelet":"Alligator leather","Fermeture du bracelet":"Folding buckle ","Couleur du bracelet":"Black","Plus de caract\u00e9ristiques":"Off-centred Double Tourbillon 30\u00b0<br \/>Outer Tourbillon 4-minute rotation indicator<br \/>Inner Tourbillon 60-second rotation indicator<br \/>Hours and minutes display<br \/><br \/>Movement<br \/>388 parts<div>2 Tourbillon cages : 128 parts<div>Weight of the two cages : 1.17 g<\/div><div>38 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>Series-coupled fast-rotating double barrels. equipped with a slip-spring<br \/>to avoid excessive tension<br \/><\/div><div>Balance wheel Free sprung balance with white gold mean-time screws<\/div><div>Main Plates Spotted and frosted nickel palladium<\/div>Bridges frosted and gold-finished nickel silver<br \/>\u201cMessage from the Inventor Watchmakers\u201d text in relief on a gold plate<br \/><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><div>Hand-engraved individual number<br \/><br \/><\/div><div>Hand-sewn strap<\/div><div>Folding clasp engraved with the Greubel Forsey logo<\/div><\/div>"}

Invention Piece 1

Reference: GF 02N OR5

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Brand  :	Greubel Forsey
Collection  :	Double Tourbillon 30°
Model  :	Invention Piece 1
Reference  :	GF 02N OR5
Nber of pieces :	11
Complement :	Red gold
Year :	2011
Is not commercialised any more

478 400 €Recorded list price in FranceI WANT ITADD TO CART

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EDITORS REVIEW

You dream to buy this real UFO watch? Too late, the 11 units have already all been sold. But nothing prevents to discover this brand of very high-class at Chronopassion in Paris, sole distributor of Greubel Forsey in France ...

• Brand  :	Greubel Forsey
  Collection  :	Double Tourbillon 30°
  Model  :	Invention Piece 1
  Reference  :	GF 02N OR5
  Nber of pieces :	11
  Complement :	Red gold
  Year :	2011
  Is not commercialised any more
  List Price :	478 400 €
  Diameter :	43.5 mm
  Thickness :	16.64 mm
  Styles :	High Horology Atypical
  Types :	Hand-winding
  Calibre :	GF 02N
  Calibre distinction :	Hand-engraved
  Complication :	Twin Rotating Tourbillons Power Reserve Indicator
  Case material :	Red gold
  Case peculiarity :	Transparent caseback Sapphire caseback
  Shape :	Round
  Water-resistance :	30 meters
  Display :	Hands Blue triangle (Minutes) Red triangle (Hours)
  Glass :	Sapphire
  Strap material :	Alligator leather
  Strap color :	Black
  Strap clasp :	Folding buckle
  + More characteristics :	Off-centred Double Tourbillon 30° Outer Tourbillon 4-minute rotation indicator Inner Tourbillon 60-second rotation indicator Hours and minutes display Movement 388 parts 2 Tourbillon cages : 128 parts Weight of the two cages : 1.17 g 38 jewels Olive-domed jewels in gold chatons Power reserve : 72 hours Frequency : 21 600 vibrations/hour Series-coupled fast-rotating double barrels. equipped with a slip-spring to avoid excessive tension Balance wheel Free sprung balance with white gold mean-time screws Main Plates Spotted and frosted nickel palladium Bridges frosted and gold-finished nickel silver “Message from the Inventor Watchmakers” text in relief on a gold plate 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 Hand-engraved individual number Hand-sewn strap Folding clasp engraved with the Greubel Forsey logo

DESCRIPTION

• Invention Piece 1
  
  Honouring the first invention
  
  The Invention Piece 1 embodies Robert Greubel and Stephen Forsey ’s wish to honour the Double Tourbillon 30° and to raise the bar yet another notch by opening up whole new vistas for their first major invention. Both the architecture of the movement and the display of information symbolise the four years of meticulous research that the inventor-watchmakers have devoted to developing the new mechanism.
  
  In the Invention Piece 1, the creative Greubel Forsey twosome have rearranged the volumes and surfaces of the timepiece according to a new technical and aesthetic structure. The Double Tourbillon 30° is placed at the centre of a semi-circular hour and minute display, thereby visually reinforcing the link between the mechanism responsible for measuring the time and its “symbolic” indication.
  
  The invention at the stage centre
  
  In contrast to the Double Tourbillon 30°, the movement driving the Invention Piece 1 has been profoundly modified and as a consequence the double cage, shifted slightly to the left and distinctly higher. This freed up space to place the object of the invention at the very centre of the highly original hour and minute display. Two triangular indicators – a red one for the hours and a blue one for the minutes – enable the observer to follow the passing of time on the mechanism’s two concentric semi-circles.
  
  To facilitate read-off, the 12-hour and 0-minute markers are aligned at the traditional 12 o’clock position.
  
  Four different rotations
  
  Magnificently evoking the mechanical genius of the Invention Piece 1, the various speeds of rotation of these different elements give an idea of the complexity of the mechanism: whereas the outer cage takes four minutes to perform a complete rotation and the inner cage just 60 seconds, the double hands turn in 24 hours for the hours display and two hours for minutes.
  
  Around the Tourbillon and its indicators, the absence of a dial reveals the frosted nickel silver bridges coated with either red gold or palladium nickel and clearly visible on three distinct levels.
  
  This opening provides a view of the concentric gearing, serving to drive the hour and minute indicators. The off-centred small seconds and power-reserve displays are reminiscent of a miniature solar system.
  
  Message from the Inventors
  
  While the case, with its signature Greubel Forsey lugs, is immediately recognisable, the Invention Piece 1 expresses its unique nature, and it is reinforced by an unexpected detail: engraved on a plate on the case back is a personalised message from the inventor-watchmakers that will forever accompany the owner of this exceptional timepiece.
  
  A total of 388 parts contribute to the smooth running of the movement driving the Invention Piece 1, including 128 for the double cage that weighs just 1.17 grams.
  
  The Invention Piece 1 is produced in a single edition comprising three versions of 11 watches each, a number (1+1) chosen for its symbolic value representing the Robert Greubel and Stephen Forsey partnership.