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.
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
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
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
Hand-sewn black or brown alligator with gold clasp, “Greubel Forsey” hand engraved