With every invention, Greubel Forsey has added a significant milestone to the history of watchmaking. The Double Balancier, patented in 2007, is one of them. It was first demonstrated in an Experiment Watch Technology prototype, with two superimposed regulating organs inclined at 20°. A second iteration followed soon after, this time in a six piece unique edition with the two regulating organs positioned in different three-dimensional planes and inclined at 35°. Finally, in 2016, Gruebel Forsey presented the invention in its current, double-patented form: the two balance wheels are dissociated, included at 30° and separated by a constant spherical differential which calculates their average timing rate.

This year, Greubel Forsey unveils a new timepiece emphasising the architectural dimensions of its 6th invention that is the Double Balancier Convexe. The three regulating organs (two balance wheels and one differential) occupy more than half of the dial and provide unprecedented depth. The timepiece is contrasting, highly technical and more contemporary than ever.

The titanium case contains a curved synthetic sapphire crystal. The caseband diameter measures 43.5 mm while the bezel diameter measures 46.5 mm. The titanium crown is polished and straight grained and contains the GF logo. The case is water resistant to 100 meters.

The movement has two coaxial series-coupled fast-rotating barrels, one of which is equipped with a slipping spring to avoid excess tension. The bridges and main plate are made of titanium that is frosted, polished and has some black treatment. The movement vibrates at a frequency of 21,600 vibrations per hour and holds a power reserve of 72 hours.

Only 22 Double Balancier Convexe timepieces will be made per year between 2022 and 2024 for a total of 66 pieces.