The programming of the large and small striking mechanisms is done through simple pressure on a waterproof push-button placed at the 10.30 mark on the watchcase. This push-button programmable function enables the movement of the striking mechanism to be stopped. The minute repeater enables the “Chime of Westminster” to be activated at any time, and so giving the complete strike of the hours, the Westminster quarters and the minutes. The “Grand Sonnerie” is the only watch in which the Tourbillon is visible on the dial side, which limits the space available for the “Grand Sonnerie” mechanism and thus makes the design even more complicated.

The glass sapphire case back enables the harmoniously chiselled and decorated pieces that overlap to be admired in a stunning combination as a dazzling ballet. This masterpiece of complications and know how was entirely designed and manufactured by the Franck Muller group and once again demonstrates their vast array of skills and ability in the Art of HAUTE HORLOGERIE.