Grande Sonnerie

Grande Sonnerie

Eleven years of development. 935 components. Two patents. The most complex timepiece Greubel Forsey has ever built.

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Grande Sonnerie
Eleven years of development. 935 components. Two patents filed. An acoustic resonance cage engineered in titanium. Eleven safety mechanisms built in to protect the striking train. Each figure reflects a specific problem solved — and the Grande Sonnerie carries all of them.
Grande Sonnerie
Three striking modes: Grande Sonnerie strikes the hours and quarters in passing; Petite Sonnerie strikes the full hours; Silence suspends all striking. The resonance of the chime is shaped by a titanium acoustic cage, engineered specifically for this movement to amplify projection and clarity.
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Grande Sonnerie
The striking train operates on a dedicated power reserve, independent from the going train, ensuring consistent acoustic output without compromising timekeeping. Water-resistant to 3 atm. The case is engineered for wrist comfort without compromising the acoustic properties of the resonance cage.

Grande Sonnerie

Minute repeater on demand by crown mounted pusher, striking modes selection by pusher, grande and petite sonnerie, silence, striking power reserve, Tourbillon 24 Secondes, hours and minutes, small seconds, movement power reserve.

Case material

Titanium

Water resistance

3 atm - 30 m - 100 ft

Limitation

1 timepiece/year

Power reserve

72 hours

Frequency

21,600 vibrations/hour

Case diameter

43.50 mm

Case height

16.13 mm

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For questions about our timepieces, our retail partners, or your existing Greubel Forsey collection — our Concierge team responds personally. Write to us and we will get back to you directly.

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