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The Encyclopedia of Horology

Component record · Dial & hands

Date Wheel

Partially verified

Numbered ring

What it does

Displays date of month

How it works

Evolution

Standard in most modern watches

Known variations

    Identification for collectors

      Common failure modes

      • Misalignment

      Diagram

      date ring, thirty-one positionsdate aperturedriving wheel and jumper
      Schematic: calendar work under the dial. 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.