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The Encyclopedia of Horology

France / Switzerland · 1840s–1850s, with numerous competing mechanisms

Keyless (Stem) Winding and Setting Work

Needs research

Keyless winding eliminated the separate winding key, made watches faster to set and wind, and reduced case wear at the winding hole; it became universal once reliable, robust mechanisms existed.

Adrien Philippe is widely credited with an early practical keyless winding mechanism, demonstrated at the 1844/1845 Paris exposition period and refined through the following decade with Patek's firm.

Multiple other makers filed competing keyless-work patents in France, Switzerland and England during the same period; the crown-wheel-and-clutch layout that became standard was the result of iterative refinement across several firms, not one single patent.

Background

Before the development of keyless mechanisms, mechanical watches required a separate winding key to manually turn the mainspring. In 1842, Adrien Philippe invented a mechanism that allowed watches to be wound and set using a crown rather than a key. Other inventors also contributed to this field, as multiple competing keyless systems appeared throughout the 19th century. Adrien Philippe's system was demonstrated at the 1844 French Industrial Exposition where he earned a Bronze Medal for the invention.

Written from the encyclopedia entries listed under Sources; each statement was checked against the cited text.

How it works

  • The mechanism utilizes a crown to wind the watch and set the time.
  • Some designs incorporated a rocking bar and a side push-button to facilitate the setting process.

Later history

  • Thomas Prest secured an early British patent for a pendant winding mechanism in 1820.
  • Adolphe Nicole patented a keyless work in London in 1844 that saw widespread adoption.
  • E. J. Dent & Co. acquired the rights to the Nicole system in 1846 and integrated it into their production.

How to verify this yourself

French patent claims from this period are held by the Institut National de la Propriété Industrielle (INPI); Swiss claims predate the 1888 federal patent law and are harder to trace centrally. Exact patent numbers require direct archive search by applicant name and year; none are asserted here.

Manufacturers known to have used it

  • Patek Philippe
  • most Swiss and later American manufacturers by the 1880s–1900s

Photographs

Keyless work AKA winding and setting - Carignan Watch Company
Keyless work AKA winding and setting - Carignan Watch Company — cwrnh.com, Rights unverified — web image search result, review pending. Web page (cwrnh.com)

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

Sources & references

  1. Adrien Philippe, Wikipedia (English), retrieved 2026-10-28 (text CC BY-SA 4.0)
  2. Watch, Wikipedia (English), retrieved 2026-10-28 (text CC BY-SA 4.0)
  3. Patek Philippe Museum, published company history (used for attribution claim only)
  4. INPI archive index — existence of period filings, not individually verified

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