National Association of Watch and Clock Collectors - www.nawcc.org
Founded in 1943, The NAWCC is a nonprofit scientific organization that serves as a unique educational, cultural, and social resource for its membership and the public at large.
Toronto Chapter 33 National Association of Watch and Clock Collectors - https://chapter33toronto.wixsite.com/website
Windows Timing Machine - http://home.teleport.com/~gregsa/clocks/wtm/index.htm
Use your PC as a low cost clock timing machine.
Time Savers - www.timesavers.com
TimeSavers is a worldwide distributor of clock parts and repair material, in business since 1975.
Merritt's Antiques - www.merritts.com
Good selection of clock parts and antiques.
Butterworth Clocks - www.butterworthclocks.com
User butterworth & pw butterworth to enter the site
Butterworth Clocks is the largest distributor of mechanical movements in the US, stocking over 300 different movement executions and 10,000 movements at any given time.
H & W Perrin Company - https://perrinwatchparts.com/