Greubel Forsey Grande Sonnerie

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Greubel Forsey Grande Sonnerie
© Greubel Forsey

Grande Sonnerie is a wristwatch by Greubel Forsey.

With this hitherto most complicated watch developed by this manufacturer, Greubel Forsey wins the “Mechanical Exception” award at the 18th Grand Prix d'Horlogerie de Genève (GPHG).

Robert Greubel, Stephen Forsey and their team completed eleven years of research for this model, assembled no less than 935 components, filed two patents, incorporated Greubel Forsey's third basic invention (the Tourbillon 24 Secondes), developed an acoustic resonance cage generating an extreme purity of sound, installed eleven functional safety features, and carried out a three-year wear test.

Movement:

Manual winding manufacture movement, 21,600 A/h
Tourbillon
Repetition with automatic winding
935 components
85 jewels
Double barrel
Power reserve 72 h

Case:

Titanium
Ø 43.5 mm, H 16,13 mm
Sapphire crystal domed and transparent caseback
Lateral window with shaped sapphire
Waterproof to 3 atm

Dial:

Multi-level in gold, black colour
Window showing the hammers and the gongs
Gold hour markers
Gold display sectors

Functions:

Hours, minutes, small second
Power reserve indicator, indication of the striking power reserve

Bracelet:

Hand-sewn Alligator strap with folding clasp