Skip to content
The Encyclopedia of Horology

Component record · Escapement

Novodiac Spring

Partially verified

Tri-lobed spring

What it does

Economical shock protection

How it works

Evolution

Found in ETA base movements

Known variations

    Identification for collectors

      Common failure modes

      • Hard to seat

      Diagram

      top plate or bridgespillar platebalance and cockwheel train between the plates
      Schematic: plate and bridge layout. 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.