Horology

Hoffman Clock Museum - Displays pieces collected by jeweler Augustus Hoffman (1856-1945) in Newark, New York, specializing in New York makers such as Abner Jones, Henry Loomis, Jared Arnold. Extensive photos.
http://www.hoffmanclockmuseum.org/

The National Watch and Clock Museum - Pennsylvania museum featuring a collection of over 12,000 watches, clocks, tools, horological art and models.
http://www.nawcc.org/museum/

American Clock and Watch Museum - Includes a collection of over 3,000 clocks and watches. Includes online exhibit of notable American clocks and clockmakers.
http://www.clockmuseum.org/

Timexpo Museum - Museum dedicated to the history of the Timex watch. Virtual tour, electronic postcards, timeline, news and links.
http://www.timexpo.com/

Ithaca Clock Museum - Displays clocks made by American manufacturers such as Ithaca Calendar Clock Company, Clinton and Mood, and Poole. In Ithaca, New York, established 2003.
http://www.ithacaclockmuseum.com/

Chelsea Clock Museum - Virtual museum gives detailed history of clock company known especially for marine clocks and "precision regulators," established by Joseph H. Eastman in Chelsea, Massachusstts in 1897. With photos, serial numbers, and early 20th-century catalogs.
http://www.chelseaclockmuseum.com/