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- Horology: The Index
- Time Zone Java
- National Watch and Clock Museum
- The British Horological Institute
- Town of Medfield
- U.S. Naval Observatory, Washington, DC
- Canadian Clock Museum – Is the only clock museum in Canada, and the only museum in the world that showcases clocks made and sold in Canada between 1800 and the present time
- FTL Design – History of Electric Clocks
- Time Synchronization Software
- Clocks: the monthly magazine for clock collectors, repairers and makers worldwide
- Warren Telechron Restored Master Clocks
- The Horological Foundation – Antique Clocks and Watches. The Portal site for Collectors, Restorers and Dealers worldwide
- Network Time Foundation A foundation to facilitate synchronization of computer time – including the NTP (network time protocol) standard.
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CUSTOMERS