Updated 21 March 2013.
Westclox, based in La Salle, Illinois, USA, started making synchronous electric clocks in 1931. The first clocks were fitted with Sangamo movements, made by Westclox under licence. They started using their own design of synchronous motors in 1932. Non war production stopped in 1942, and normal production resumed in 1946. Westclox started making synchronous electric clocks in Dumbarton, Scotland in 1948. The company closed in 2001. For fuller information, and the history of the company, see LINZ J. Westclox electric. Atglen, PA: Schiffer Publishing Co., 2004. The book includes extensive information on individual models, up to 1970, including a picture gallery. Also see http://www.clockhistory.com. This includes a Westclox chronology, and points out that many of the Westclox advertising clocks on the market are fakes.
For more information on a clock click on the link. Model designations in the list, and in descriptions, are from Linz’ book, as are dates in descriptions.
Westclox Model BE2 Logan synchronous alarm clock S 25 Westclox A
Westclox Type EM22 synchronous alarm clock S 1 Westclox A
Westclox synchronous alarm clock S 160 Westclox A
Westclox synchronous mantel clock (1) S 123 Westclox A
Westclox synchronous mantel clock (2) S 12 Westclox_A
Westclox Guinness synchronous mantel clock S 77 Westclox A
Westclox Skol synchronous wall clock S 46 Westclox C
Westclox Double Diamond synchronous wall clock S 222 Westclox A