Skip to content
The Encyclopedia of Horology

Component record · Keyless work

Operating Lever

Partially verified

Primary pusher lever

What it does

Starts and stops the chronograph

How it works

Evolution

Connects pusher to column wheel/cam

Known variations

    Identification for collectors

      Common failure modes

      • Bending

      Diagram

      driving wheelcoupling clutchcolumn wheelpusher
      Schematic: chronograph control. An outline schematic drawn to show the arrangement of the parts discussed here. It is not a dimensioned working drawing and does not depict a particular maker's calibre.

      Sources & references

      1. de Carle, D., Practical Watch Repairing
      2. de Carle, D., Watch and Clock Encyclopedia
      3. Daniels, G., Watchmaking

      Where sources disagree, the disagreement is stated rather than resolved silently.