Le Locle, Switzerland
Ulysse Nardin
Partially verifiedMarine chronometers and precision deck watches
History
Le Locle firm that specialised in marine chronometry and precision observation watches, supplying navies and observatories and accumulating a substantial record in observatory timing trials.
Major innovations
- Sustained series production of marine chronometers and deck watches to naval specification
Known markings
- 'Ulysse Nardin Locle & Genève'
- Naval issue markings on supplied instruments
Serial numbers
Naval and observatory supply records exist in institutional archives; dating usually requires both maker and institutional sources.
Collecting significance
Provenance documents and unrestored original dials are the key research points.
Photographs

Photographs are illustrative examples of the type, not necessarily the exact object described. Verify details against the source file page.
Sources & references
- Museum chronometry collection catalogues
- Auction catalogue literature
Where sources disagree, the disagreement is stated rather than resolved silently.