Greubel Forsey Grande Sonnerie
Aside from the inordinately long time it took to develop this timepiece, the other remarkable feature of the Greubel Forsey Grande Sonnerie is its size. With a diameter of 43.5mm and thickness of 16.13mm, it’s not much bigger than its less complicated brethren, such as the Tourbillon 24 Seconds Contemporain. It’s also surprisingly robust, being equipped with 11 security devices, such as disconnecting the time-setting when the watch is chiming and vice versa.
