Traces of Time

Movements & Technology · Bulle Clock

CS Projects – Bulle Clock

Independent specialist page about the Bulle Clock with information on its technology, production history and dating by serial number. It includes surviving production data based on research by John Hubby.

French Blog

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Identification & Dating · Bulle Clock

Dating a Bulle Clock by Serial Number

Date a Bulle Clock using its serial number. Includes a serial-number search, complete dating table, guidance on where to find the serial number, sources and further information.

German , English Database

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Specialist Knowledge & Research · Chronometry and Horological Research

German Society for Chronometry (DGC)

The German Society for Chronometry (DGC) is dedicated to the research and documentation of timekeeping. Its website provides information on horological history and technology, specialist interest groups, publications, and an extensive horological library in Nuremberg. It offers a wealth of resources for anyone interested in historical clocks and watches and the technology behind them.

German Website

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Movements & Technology · Historical Clocks

Hartmut Wynen – Historical Clocks

Extensive independent specialist website on historical electric clocks, with technical information, restoration reports and documented examples. It also includes information and reference examples relating to Bulle Clocks.

German Webseite

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Movements & Technology · Bulle & Eureka Clocks

Horologix – Bulle & Eureka

Specialist website on Bulle and Eureka battery clocks, featuring extensively documented restorations, photographs and technical information. It also includes historical documents, catalogues and guides covering the construction, inspection and repair of these clocks.

English Website

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Identification & Dating · Word & Figurative Trade Marks

Mikrolisk – Horological Trade Mark Index

Extensive database for researching historical word and figurative trade marks used in the clock and watch industry. Entries include trade mark names, manufacturers or companies, locations and registration details. Figurative marks can also be searched by their depicted motifs. The website opens in German; select “English” in the top-right corner to switch to the English version.

German , English Database

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Specialist Knowledge & Research · Clockmaking & Watchmaking

Mikrolisk – The Horological Trade Mark Index

Comprehensive specialist website on historical clock and watchmaking, with information for identifying and dating clocks and watches, horological technology and terminology, as well as extensive historical and technical resources. A particular focus is placed on pocket watches.

German , English Website

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Movements & Technology · Electric Clocks

Thomas Murday – Mark 2 Balance Wheel Clock

Documentation from the University of Queensland Physics Museum on a Thomas Murday Mark 2 balance wheel clock. It describes the clock's construction and electromagnetic direct drive, as well as its historical connection with electrical time distribution and synchronisation.

English PDF / Document

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Movements & Technology · Electric Clocks

Thomas Murday – Murday Clock Survey

Comprehensive survey and research overview by Henry Reason on clocks by Thomas Murday and the Reason Manufacturing Company. It documents surviving Murday clocks, different designs and technical variants, as well as serial numbers and further information on their production history.

English PDF / Document

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Horological Knowledge & Research · Clock and Watch Encyclopedia

Watch-Wiki – The Clock and Watch Encyclopedia

A multilingual encyclopedia covering historic clocks and watches, manufacturers, clockmakers, watchmakers and movements. This collaboratively maintained reference explains horological terminology and technical principles and explores the history of clock and watchmaking.

German , English Website

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