ZERO-RESET MECHANISM

STARTING TO THE SECOND

THE PATENTED ZERO-RESET

With the ZERO-RESET mechanism, the movement stops and the seconds hand jumps to zero when the crown is pulled. This allows the watch to be accurately synchronised.

The mechanism consists of a complex lever system that presses a zero-reset lever against a heart-shaped cam. The seconds hand is attached to the same arbor on which the heart cam rotates. When the heart cam is pivoted into its initial position by the zero-reset lever, this also causes the seconds hand to jump to zero. Pushing the crown home again instantly restarts the movement and with it the seconds hand.


In a modified, even more complex form, this mechanism can also be found in the 1815 TOURBILLON except that here, the tourbillon must be stopped instead of the balance.

The ZERO-RESET mechanism of the 1815 TOURBILLON

EXPLORE FURTHER

TOURBILLON WATCHES
TOURBILLON WATCHES
The tourbillon improves the rate accuracy of a mechanical timepiece by overcoming the influence of gravity on the running of a watch.
JUMPING SECONDS MECHANISM
JUMPING SECONDS MECHANISM
The mechanism of the jumping second assures unambiguous readings at any time, because it advances the large seconds hand by exactly 60 steps per minute.
FINISHING AND ENGRAVING
FINISHING AND ENGRAVING
Even the most minute pieces undergo an elaborate finishing.