Skip to content
The Encyclopedia of Horology

Sirnach, Switzerland · born 1971

Andreas Strehler

Partially verified

Independent watchmaking

Life & work

Developer of extremely precise moon phase complications.

Training, contributions & innovations

  • Calculated the most accurate moon phase mechanism for a wristwatch

Inventions & patents

  • Patents for moon phase and remontoire mechanisms

Signatures & markings on surviving work

  • Andreas Strehler

Collecting significance

Authenticity depends on signatures and movement quality. For 19th-century makers, serial numbers often allow for precise dating. For modern independents, documentation from the maker is key.

Related photographs

Digital Triple Calendar Moon Phase PocketWatch – C1880
Digital Triple Calendar Moon Phase PocketWatch – C1880 — WatchMuseum.org, © WatchMuseum.org, used with permission. WatchMuseum.org catalogue record
Digital Triple Calendar Moon Phase PocketWatch – C1880
Digital Triple Calendar Moon Phase PocketWatch – C1880 — WatchMuseum.org, © WatchMuseum.org, used with permission. WatchMuseum.org catalogue record
Digital Triple Calendar Moon Phase PocketWatch – C1880
Digital Triple Calendar Moon Phase PocketWatch – C1880 — WatchMuseum.org, © WatchMuseum.org, used with permission. WatchMuseum.org catalogue record

No confidently matched photograph of this subject has been found yet. These photographs show a closely related record, and are not examples of the type described on this page.

Sources & references

  1. Britten, F. J., Old Clocks and Watches and Their Makers
  2. Loomes, B., The Early Clockmakers of Great Britain
  3. Ehrhardt, R., American Pocket Watch Identification and Price Guide
  4. Museum catalogue records

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