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Greubel Forsey Double Tourbillion Historic Edition

Limited Edition of 11 Pieces in Rose Gold and 11 Pieces in Platinum

The case, in 18kt rose gold or in platinum, meausres 44.5mm x 16mm. It has double sapphire crystals and is water resistant to 30 meters.

Movement is a patented in-house Greubel Forsey caliber with 303 parts (130 for the two tourbillon cages). It has 39 jewels, 21,600 vph and a power reserve of 72 hours.

Barrels: Rapid rotating twin barrels (3.2 hour rotation), one of which equipped with a slipping spring to avoid excess tension – Balance wheel: Variable-inertia with gold mean-time screws (10.70 mm diameter). Balance spring: Phillips terminal curve, Geneva-style stud – Main Plates: Nickel silver circular graining and hand-bevelled, finished in “Nickel Palladium” – Bridges: Nickel silver frosted and hand-bevelled, finished in “Nickel Palladium”.

Gearing: Involute circle profile, conical gearing with corrected profile – Inner Tourbillon Inclined at a 30° angle, 1 rotation per minute – Outer Tourbillon: 1 rotation in 4 minutes, hand-bevelled and openworked cage pillars, gold counterweight.

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Written by kevin

July 13, 2010 at 1:47 am

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