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The Encyclopedia of Horology

Switzerland / Japan · 1950s–1970s

Quickset Date Change

Needs research

A useful dating clue: quickset versions of a calibre are usually later than non-quickset ones.

Mechanisms allowing the date to be advanced by the crown rather than by winding the hands through 24 hours.

How to verify this yourself

Identify the specific calibre first, then search manufacturer patents of that period.

Manufacturers known to have used it

  • Rolex, ETA, Seiko and others

Photographs

Date quickset not working - General Watch Repairs Help & Advice - Watch Repair Talk
Date quickset not working - General Watch Repairs Help & Advice - Watch Repair Talk — watchrepairtalk.com, Rights unverified — web image search result, review pending. Web page (watchrepairtalk.com)

Photographs are illustrative examples of the type, not necessarily the exact object described. Verify details against the source file page.

Sources & references

  1. Manufacturer calibre literature
  2. Ranfft movement archive (community reference)

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