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The Encyclopedia of Horology

London, United Kingdom

John Arnold & Son

Partially verified

Marine and pocket chronometers

History

John Arnold devised the spring detent escapement form widely adopted in chronometers.

Major innovations

    Known markings

    • 'Arnold'
    • 'Arnold & Dent'

    Serial numbers

    This archive holds no verified serial-number table for this maker. Do not date a piece from its serial number alone; use case hallmarks, movement design and documented comparison examples.

    Collecting significance

    Originality of dial, hands, case and movement is the main consideration. Check that the movement belongs to the case and that the dial has not been refinished.

    Photographs

    John Arnold
    John Arnold — Unattributed Wikimedia Commons contributor, Public domain. Wikimedia Commons file page

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

    Sources & references

    1. Kathleen H. Pritchard, Swiss Timepiece Makers 1775–1975
    2. Brian Loomes, Watchmakers and Clockmakers of the World
    3. Mikrolisk trademark and maker index

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