The hour-strike is an extremely rare complication, and the layout used for ULTRAVOX is unique, with the mechanism revealed in its entirety. Having it visible on the wrist allows ail its beauty and complexity to be admired.

Precisely on the hour, the flirt, located at 6 o'clock and engraved with the words "sonnerie au passage", is engaged, striking a gathering pallet that in turn releases the strike hammer.

This is the departure signal: as if by magic, the whole, unique cadrature cornes to life. The inertia braking flywheel (located at 9 o'clock) cornes into play, regulating the rhythm of the strike.