Glossary · Case & Dial

Dynamic-scattering mode (DSM)

An early liquid-crystal display mode identified in electronic-watch histories.

Explanation

Seiko Museum’s account distinguishes dynamic-scattering-mode LCDs from the field-effect LCD used in its 1973 six-digit 06LC. Retain the exact mode only when the source establishes it. A rectangular display or an early date is not sufficient to identify DSM: the Science Museum Group Waltham record identifies LCD but does not specify the mode. For component analysis, consult an exact movement or display reference rather than infer construction from case style.

Sources & references

https://museum.seiko.co.jp/en/knowledge/Quartz04/

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

Related visual reference

Context only — Waltham International LCD watch, 1976-464; LCD mode not established for this Waltham — © The Board of Trustees of the Science Museum / Science Museum Group, CC BY-NC-SA 4.0 stated by source; commercial permission review pending. Retrieved museum or publisher record

The photograph illustrates a related mechanism or component; consult its caption and source record for the exact object shown.

Cross-references

Nearby case & dial terms

Double-sunk dial: An enamel dial with the chapter ring and sub-seconds recessed at different depths from the main surface.
Dust cover: Any inner cover, of metal or later of celluloid or plastic, protecting the movement from dust ingress.
Dust-proof: A case designed to prevent the ingress of fine particles.
Edge: The outer boundary of a case or dial.
Emissive watch display: An indication that produces light, exemplified by LED digital watches.
Enamel (porcelain) dial: A dial of vitreous enamel fired onto a metal base.