uartz watches beat dead seconds quite naturally, so to speak: the seconds hand jumps neatly in 1-second intervals. Contrary to this, in mechanical watches the seconds hand seems to glide. Making it jump forward by one second may seem simple to the uninitiated. And yet it is a genuine – and rather rare – complication. Dead-seconds hands were found in the regulator clocks in watch workshops because of the precision they provided, but they were driven by the pendulum movement. In a wristwatch, it is quite another matter.