| UNITAS Reference Site UNITAS wristwatch and pocketwatch movements from 1898 to the present. | |
| 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. | |
| R.A. Braithwaite Educational site Elliott clocks, how they are built and how to look after them. | |
| 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. | |
| Pocket Horology National chapter of the NAWCC dedicated to collaborative research on the history and horology of pocket watches. | |
| 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. | |
| Online Clock Building Watch a master clockmaker building a clock movement from scratch. Hundreds of photos and drawings, plus a complete description of the process and CAD plans. | |
| 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. | |
| 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. | |
| Louis Essen Autobiography of the physicist who built the world's first operational atomic clock. | |
| Lincolnshire Branch of the British Horological Institute News, events, activities and general information maintained by BHI members. | |
| Leap Year Frequently Argued Questions A humorous approach towards explaining the nature of leap years, in particular why 2000 is a leap year. | |
| Leap Year Calculation for Year 2000 A response to a VMS problem report giving a detailed explanation of why 2000 is a leap year. | |
| 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. | |
| 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. | |
| How The Days of the Week Got Their Names A short history of the week and each day of the week. | |
| 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. | |
| Horology.com Horology is the science of time, timekeeping and timekeepers. Organized collection of links to horological websites globally. | |
| 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. | |
| 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. | |
