Grande Sonnerie

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Grande Sonnerie
Eleven years of research and development. The assembly of no fewer than 935 parts. The filing of two patents. The development of an acoustic resonance cage producing an extremely pure sound. The incorporation of eleven security functions ensuring maximum peace of mind... These few elements alone give an idea of the magnitude of the almost gargantuan task of creating the first Greubel Forsey Grande Sonnerie.

The most important elements and indications (such as the tourbillon, the cathedral gongs, the striking hammers, and the power reserve and mode indicators) were incorporated with the greatest care to ensure architectural balance. This was no mean feat – the watch designers succeeded in housing the 935 parts comprising this timepiece and its exterior in a space measuring 43.5 mm in diameter and 16.13 mm high. The Grande Sonnerie is well and truly Greubel Forsey’s most complex creation to date.

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