Double Tourbillon 30°

Inside a cage which rotates in four minutes, an interior cage containing the balance wheel is inclined at a 30 degree angle relative to the first cage, which rotates in sixty seconds. The combination of the 30° inclination with the different rotational speeds of the two tourbillion cages improves timekeeping by averaging out positional errors due to gravity in all usual wristwatch positions, and especially in static positions.

Double Tourbillon 30° Technique

With its open architecture offering superb visual access to the mechanism, the movement of the Double Tourbillon 30° is hand-wound. It has a 120-hour power reserve guaranteed by four fast-rotating coaxial barrels.

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Double Tourbillon 30° Asymétrique

In this version, the Double Tourbillon 30° features an asymmetric case. The rotating Double Tourbillon cage system has in turn been repositioned between 7 and 8 o’clock. The Double Tourbillon 30° has been redesigned and notably features a new tourbillon bridge, to be displayed “in reverse”.

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Double Tourbillon 30° Edition Historique

This Edition Historique commemorates the closing of the Double Tourbillon 30° Contemporain Vision line after six successful years. The inventors of the now iconic Double Tourbillon 30° explain their reasoning and philosophy in text on the dial and on four hand decorated curved plates screwed onto the caseband.

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Double Tourbillon 30° Secret

With a preference for discretion, the Double Tourbillon 30° now appears in a less extrovert and one might almost say ‘secretive’ style, even though such a splendid dial naturally hints at the treasure it is guarding. The timepiece presents an unusual and particularly wide subdial at 6 o’clock with a slender blued steel hand testifying to the four-minute rotation of the outer cage of the Double Tourbillon 30°.

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Double Tourbillon 30°

Greubel Forsey's first invention is an innovative Double Tourbillon mechanism, with one Tourbillon cage - inclined at 30° and rotating in 60 seconds - inside another cage, completing a full rotation once every four minutes, to average out gravity-induced errors on the oscillator.

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