| "Orologio" at the St. Mark's Square Tower, Venice - Antica Orologeria Zamberlan: Website of Antica Orologeria Zamberlan, Italy. Extensive technical and historical explanation of the restoration and controversy of the "Orologio" Tower at St. Mark's Square, Venice. |
| 24 hour analog clocks: The 24 hour analog clock and watch site. History, software, and the places to find clocks with 24 h dials. |
| Abbey Clock Clinic - Mark Headrick's Horology Page: Traditional horology website with information and mantainance tips. Technical descriptions and troubleshooting of escapements. Grandfather clocks, wall clocks, and watches. |
| Allan Variance -- Overview by David W. Allan: Core algorithm of international time scale has multiple metrology applications, from atomic clock frequency characterization to definition of the meter. Equation, explanation and publications. |
| Antique Horology: The Horological Foundation's directory of web sites for watches, clocks, instruments and barometers. |
| Clocks and Time: Horological index for organizations, clock and watch museums, related software, mailing lists and links. Maintained by Gordon T. Uber. |
| Cumbria Clock Company: Company specialized in all aspects of work connected with church clocks, public clocks, and tower clocks which includes the full historical restoration of antique clock movements. |
| David Knight - Watchmaker from UK: Articles and pictures of the first two watches made by David Knight. Rich artistic pictures. |
| Daylight Saving Time: History of daylight saving time and how we use it to save energy. |
| Hampton Court Clock: The story of the famous Astronomical clock at Hampton Court Palace. By the author of the original official guide books with the extra omitted information. |
| Horology - A Great Hobby: A very basic introduction to how electric clocks work, with animated pictures. Also a collection of cheap electric clocks with pictures and descriptions. |
| Horology.com: Horology is the science of time, timekeeping and timekeepers. Organized collection of links to horological websites globally. |
| How Stuff Works: Time: Complete five-part explanation of time and how it is measured, including information about clocks, time zones, calendars, BC and AD. |
| How The Days of the Week Got Their Names: A short history of the week and each day of the week. |
| Jens Olsen's Astronomical Clock: Description of the restoration of Jens Olsen's Astronomical Clock, a masterpiece in Copenhagen City Hall that consists of 15.448 individual parts. |
| Layman's Guide to the Gent's Electric Turret Clock: A Layman's Guide to the working and restoration of a Gent's Pulsynetic Waiting Train Electric Pendulum Turret Clock. |
| Leap Year Calculation for Year 2000: A response to a VMS problem report giving a detailed explanation of why 2000 is a leap year. |
| Lincolnshire Branch of the British Horological Institute: News, events, activities and general information maintained by BHI members. |
| Louis Essen: Autobiography of the physicist who built the world's first operational atomic clock. |
| Mark Frank's Home Page: Website showing the restoration of a french flat bed tower clock in great detail, step by step, as well as other information and links of tower clock sites. |
| On Time: The Smithsonian Institute's exhibition on the changing ways we have measured, used, and thought about time over the past three hundred years. |
| Pocket Horology: National chapter of the NAWCC dedicated to collaborative research on the history and horology of pocket watches. |
| Pulsynetic Electric Clocks: Description, pictures and diagrams of many of the horological products made before 1945 By Gent's of Leicester GB, including a rare Observatory controlled transmitter. |
| R.A. Braithwaite: Educational site Elliott clocks, how they are built and how to look after them. |
| The History of Clocks and Watches: Learn about the history of clocks and watches, and discover the evolution of timekeeping devices from the first primitive sundials to the ultramodern atomic clocks. Includes a timeline. |
| UNITAS Reference Site: UNITAS wristwatch and pocketwatch movements from 1898 to the present. |
Classical
