Founded in 2004, Greubel Forsey’s Grande Sonnerie watch design is far from ordinary. With 11 years of research, coupled with assembling no less than 935 parts, filing two patents and incorporating the brand’s third fundamental invention, the Tourbillon 24 secondes, the sheer attention to detail has made this project one of the most complex of its kind.
The acoustics of this watch are all the more impressive given that the timepiece is water resistant to approximately 30 metres. In addition, a titanium acoustic resonance cage was developed inside the case band itself, so as to provide the loudest possible volume. The two striking hammers are visible on the dial side, featuring flat black-polishing, hand bevelling and polished countersinks. The gold bridge supporting them is relief-engraved and has the same exceptional finishes, as well as straight-grained flanks.
While the movement is manual-winding, the striking mechanism also features an automatic winding system by means of a platinum oscillating weight engraved with the Greubel Forsey guiding spirit. Despite its complexity, Greubel Forsey has aimed to complete five to eight of these timepieces each year.
£999,643 / €1.1m / $1.16m