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The Encyclopedia of Horology

London, United Kingdom

Eureka Clock Company Ltd

Partially verified

Electromagnetic balance wheel clocks

History

The company originated from the inventions of American electrical engineer Timothy Bernard Powers, who filed his first patent for an electromagnetic balance wheel design in 1906.

After receiving financial assistance from the London-based Kutnow Brothers, Powers relocated to London to initiate production. The Eureka Clock Company Ltd was formally incorporated in 1908 with the Kutnows and company secretary Frank Jowett. Operating from City Road in London, the firm offered fifteen distinct case styles and produced approximately 15,000 clocks in total.

The extended history summarises the open references listed under Sources; each statement was checked against the cited passage. Confirm key dates in period documents before relying on them.

Current watchmaking & later fate

  • The Eureka Clock Company ceased operations in 1914.

As stated in the references listed under Sources, retrieved 2026-11-03. Ownership and collections change; check the maker's own announcements for the latest position.

Key models

Madeleine
The Madeleine was a four-glass mantel clock case inspired by the church of the same name in Paris.

Major innovations

  • The company produced an electromagnetic clock movement powered by a constant 1.5-volt battery to ensure consistent oscillation.
  • Their clocks were marketed as 1,000-day timepieces due to the battery life of the electromagnetic mechanism.

Known markings

  • Clocks often bear the signature of the company on the dial.

Serial numbers

No serial-number system for this maker is recorded in the cited references.

Collecting significance

The catalogued pieces listed on this page show the kinds of objects auction houses, dealers and museums attribute to this maker; each attribution is the source's own.

In the object catalogue

3 catalogued objects are recorded under Eureka Clock Company Ltd. Attributions are as given by each source and are not independent authentication.

  • Eureka '1000 day' electric clock with glass dome on oak base
  • Eureka Clock Company 'Madeleine' model electric mantel clock, No. 14614
  • Eureka Clock Co. Ltd. striking electromagnetic '1000 day' mantel clock under glass dome, circa 1910

Sources & references

  1. Eureka Clock Co. Ltd. ca. 1910.jpg - Watch-Wiki - Das Uhrenlexikon, Watch-Wiki, retrieved 2026-11-03 (paraphrased; text © the publisher)
  2. The Eureka Clock Company Ltd. | Delaney Antique Clocks, delaneyantiqueclocks.com, retrieved 2026-11-03 (paraphrased; text © the publisher)
  3. Clock Makers, delaneyantiqueclocks.com, retrieved 2026-11-03 (paraphrased; text © the publisher)
  4. Eureka Clock Company of London England. This custom case example is No. 12072. 219017. | Delaney Antique Clocks, delaneyantiqueclocks.com, retrieved 2026-11-03 (paraphrased; text © the publisher)

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