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The Encyclopedia of Horology

Component record · Case

Movement Ring

Partially verified

Metal or plastic spacer

What it does

Centers movement in case

How it works

Evolution

Also called spacer ring

Known variations

    Identification for collectors

      Common failure modes

      • Corrosion

      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.