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Eleven years of development and research. The assembly of no fewer than 935 parts. The filing of two patents. The perfecting of an acoustic resonance cage. The installation of eleven safety features offering maximum comfort...These few details give an idea of how monumental an undertaking the creation of the first Greubel Forsey Grande Sonnerie really was.
The Grande Sonnerie has three modes to choose from: Grande Sonnerie (which strikes the hours and the quarters in passing), Petite Sonnerie (which strikes the full hours in passing) and Silence (which does not strike in passing). The pure, crystalline chime of the Grande Sonnerie is enhanced by an acoustic resonance cage made from titanium.
This timepiece represents the quintessence of Greubel Forsey’s expertise and of its ideal in terms of watchmaking excellence. This Grande Sonnerie has powerful acoustics. Moreover, this timepiece is water resistant to 3 ATM. Its ergonomics ensure maximum comfort to the wearer as well as an exceptional striking power reserve.
The movement is wound manually, but the striking mechanism features a self-winding system. The minute repeater and its supplementary striking mechanism chime exactly to the nearest minute on demand.
Greubel Forsey succeeded in housing the 935 parts of this timepiece and its exterior in a space measuring 43.5 mm in diameter and 16.13 mm high.
Silent striking regulator and Tourbillon 24 Secondes, while respecting the standard confines of a Greubel Forsey case.
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.