Designed to provide watch enthusiasts with information including chat rooms, watch forums, an on-line watch school and numerous articles to enhance your knowledge and appreciation of watches. http://www.TimeZone.com/
Information on watches from the Elgin National Watch Company, its history and technical details. Includes a serial number lookup and many scanned documents. http://elginwatches.org/
Contains historical information for collectors and a detailed bibliography. Also includes a page about the Columbus Watch Company. http://www.pixelp.com/gruen
Pictures and descriptions of a variety of American made pocketwatches. Also helpful information on subjects such as how to open a watch, what jewels are, and what Adjusted means. http://barrygoldberg.net/watches.htm
A starting point for learning about pocket watches. There are pointers on how pocket watches work, how to use them and how to judge their value. http://duke.usask.ca/~lowey/watches/index.html