| Name | Summary | Parent Co. | Child Co. | Is Base Co. |
|---|---|---|---|---|
| Western Clock Manufacturing Company | Starting in 1888 | Westclox | No | |
| Western Clock Company (the second one, 1912 - 1936) | Starting in 1912 | Westclox | No | |
| Western Clock Company (the first one, 1887 - 1888) | Started in 1887. | Westclox | No | |
| Western Clock Company Ltd. Canada | Western Clock Company, Ltd., Peterborough, Canada | Westclox | No | |
| Western Brass | 1945 advertisement: Western Brass Mills, Division of Olin Industries, Inc. East Alton, Illinois. 1956 advertisement: Western Brass, Western Brass Mills Division, Olin Mathieson Chemical Corporation, E . . . | Yes | ||
| Westclox Division of General Time Instruments Corporation | This name used when General Time Instruments Corporation was formed in 1936. | Westclox | No | |
| Westclox Division of General Time Corporation | Starting in 1949 | Westclox | No | |
| Westclox Div. General Time Canada Talley | Westclox Division General Time of Canada Limited, A Talley Industries Company; Peterborough, Canada. | Westclox | No | |
| Westclox Div. General Time Canada | Westclox Division General Time of Canada Limited; Peterborough, Canada. | Westclox | No | |
| Westclox Canada Talley Industries | Westclox Canada, Talley Industries, a division of Talley Canada Inc. | Westclox | No | |
| Westclox | This is the base company for Westclox, including United Clock Co., Western Clock Co., Western Clock Mfg. Co., etc. | Columbia Time Products; Eastern Time Limited; General Time Corporation; General Time Instruments Cor . . . | Yes | |
| Webb C. Ball | Watch manufacturers, Cleveland, Ohio. Specialized in railroad watches and clocks. | Yes | ||
| Waterbury Watch | Waterbury Watch Company was organized in 1880 to make inexpensive watches. In 1898 it was renamed New England Watch Company. | Yes | ||
| Waterbury Clock | Waterbury Clock Company. The Benedict & Burnham Manufacturing Company of Waterbury, CT was formed in January 1843 to manufacture brass sheeting, brass products and gilt buttons. By the summer of 18 . . . | Timex | Yes | |
| Warren Telechron Company | Henry Warren's second company | Telechron | No | |
| Warren Clock Company | Henry Warren's first company | Telechron | No | |
| Waltham Watch Company | Produced about 40,000 watches and related items from 1850 to 1957. (Source Wikipedia) | Yes | ||
| Wakmann Watch | Founded in 1946 by Mr. Icko Wakmann. (Source http://shop.wakmann.ch/index.php/history.html) | Yes | ||
| United Time Products | A name Westclox used ca. the 1930s - 1950s on some private label or lower priced clocks. | Westclox | No | |
| United Clock Company | Founded by Charles Stahlberg, et. al. in 1885. | Westclox | No | |
| Tork | The Tork Clock Company Inc., Mount Vernon, NY. Made clock operated switches. | Yes | ||
| Timex | Brand of popular-priced wrist watches (and a few clocks). In 1922, Waterbury Clock Company purchased the Robert H. Ingersoll & Bro. company. In 1944, Waterbury Clock Co. was renamed U.S. Time Corp . . . | Waterbury Clock | No | |
| Telechron Inc. | Telechron, Inc. ca. the 1950s | Telechron | No | |
| Telechron | This is the base company for Warren Clock Co., Warren Telechron Co., etc. as well as General Electric. | General Electric; General Electric Telechron; Revere; Telechron Inc.; Warren Clock Company; Warren T . . . | Yes | |
| Taylor Instruments | Taylor Instruments was founded in 1851. They made measuring instruments for the manufacturing industry, and altimeters for fighter jets in WWI. They are well known for their thermometers, barometers a . . . | Yes | ||
| Swartzbaugh | The Swartzbaugh Mfg. Co. Toledo, Ohio. Maker's name on the Everhot Appliance Timer made by Westclox. | No | ||
| Sunbeam | A well-known American appliance maker. Made electric clocks for a while. | Yes | ||
| Stockham Manufacturing Company | Chicago, Illinois. Some patents for cast front clock cases are assigned to them. | Yes | ||
| St. Louis Computing Company | A corporation of St. Louis, Missouri. A Stahlberg patent is assigned to this company. | Yes | ||
| Sterling Clock Company | Maker of Sterling Electric automobile clocks. Was in Meridan, Connecticut, then bought by Westclox and moved to LaSalle, Illinois. | Yes | ||
| Stancor | Standard Transformer Corporation, Chicago, Illinois. | Yes | ||
| Seth Thomas Clock Company | Before Seth Thomas was part of General Time | Seth Thomas | No | |
| Seth Thomas | The base company for Seth Thomas. Seth Thomas was born in Wolcott, CT in 1785, went to work for clockmaker Eli Terry in 1807, bought out Terry’s factory (together with Silas Hoadley) in 1810, and . . . | General Time Corporation; General Time Instruments Corporation; Plymouth; Seth Thomas Clock Company | Yes | |
| Sessions | Elisha N. Welch was born in 1809 at Chatham, CT. He was a businessman who invested in the foundry and clockmaking business. About 1856 Mr. Welch took over the bankrupt J. C. Brown clock factory and st . . . | Yes | ||
| Seiko | Founded in 1881, to produce clocks under the name Seikosha. Made watches starting in 1924. (Source Wikipedia) | Yes | ||
| Sears | This is the base company for Sears, Roebuck & Company. They sold some Westclox clocks with the Sears name on the dial. | Yes | ||
| Schatz | This is the base company for Aug. Schatz and Sohnne; Jahresuhrehfabrik, and Gutenbacher Uhrenfabrik (Gufa). Jahresuhrenfabrik (Year Clock Factory) made 400 day clocks starting around 1880 - 1885. . . . | Yes | ||
| Sangamo Electric Company | Original owner of the patents for the Sangamo motors used by Westclox and Seth Thomas. The Sangamo Electric Company was founded in 1899. Made about 40 prototype clocks in 1924 (actually made by the . . . | Yes | ||
| Salem | Salem Clock Company, 75 Van Dyke Avenue, Hartford, Conn, 06114. Maker (reseller?) of nautical clocks, probably made in Germany. | Yes | ||
| Revere | The Revere Clock Company, Cincinnati, Ohio, U.S.A. Made chime and strike clocks using Telechron motors. | Telechron | No |
