TBTE

The dead seconds is a hand that jumps forward when the second has elapsed. Generally the jump of the second hand is a distinctive feature of a quartz watch but in mechanical watchmaking, this function is a technical feat.

The tourbillon system was made to compensate the Earth’s gravitational force by mounting the escapement in a revolving cage. It gives the watch a better accuracy. This complication is known as one of the most difficult to make.