Power reserve The Invention Piece 1 pays tribute to the Double Tourbillon 30°, the first Fundamental Invention by Robert Greubel & Stephen Forsey and the fruit of 4 years’ patient research. In a restructuring of volume and surface, the emblematic double cage is placed at the centre of an innovative display: two triangular indicators – red for the hours, blue for the minutes – show the passing of time on one half of two of the concentric rings on the movement. This sumptuous timepiece, a veritable sculpture on the wrist that comes in 3 unique series (5N red gold, white gold and platinum), has another surprise in store on the back: the story of the Invention engraved in relief on a gold plate.
Movement Patented hand-wound, GF 02N calibre, Double Tourbillon (one inside at an angle of 30°, the other outside), 38 jewels, 21,600 vib/h, 72-hour power reserve
Functions Off-centre Double Tourbillon 30° (outer tourbillon rotates every 4 minutes, inner tourbillon every 60 seconds), sectorial display of hours and minutes, seconds display and sectorial power reserve indicator

Case Gold or platinum, 43.50 mm
Convex sapphire front and back
Back with hand-hammered bas-relief engraving of the story of the Invention
Water-resistant to 30 m
Bracelet/Strap Hand-sewn black or brown alligator with gold clasp, “Greubel Forsey” hand engraved
Material : Gold
Movement : Mechanical, manual-winding
Tourbillon
 

Robert Greubel and Stephen Forsey have been working together for over 15 years. They have formed a relationship based on inventing.Robert and Stephen began working on a new generation tourbillon in 1999.  Over four years later, they unveiled their brand ‘Greubel Forsey’.

EWT®, for Experimental Watch Technology, is Greubel Forsey’ proprietary research and development platform. At  the core of the system, is the lab which enables Greubel Forsey to experiment, test and ratify.

The Invention Piece 1 pays tribute to the Double Tourbillon 30°, the first Fundamental Invention by Robert Greubel & Stephen Forsey and the fruit of 4 years’ patient research. In a restructuring of volume and surface, the emblematic double cage is placed at the centre of an innovative display: two triangular indicators – red for the hours, blue for the minutes – show the passing of time on one half of two of the concentric rings on the movement. This sumptuous timepiece, a veritable sculpture on the wrist that comes in 3 unique series (5N red gold, white gold and platinum), has another surprise in store on the back: the story of the Invention engraved in relief on a gold plate. Movement Patented hand-wound, GF 02N calibre, Double Tourbillon (one inside at an angle of 30°, the other outside), 38 jewels, 21,600 vib/h, 72-hour power reserve Functions Off-centre Double Tourbillon 30° (outer tourbillon rotates every 4 minutes, inner tourbillon every 60 seconds), sectorial display of hours and minutes, seconds display and sectorial power reserve indicator
Case Gold or platinum, 43.50 mm
Convex sapphire front and back
Back with hand-hammered bas-relief engraving of the story of the Invention
Water-resistant to 30 m
Bracelet/Strap Hand-sewn black or brown alligator with gold clasp, “Greubel Forsey” hand engraved