[gatorcpa]

NAWCC Chapter 149 has posted serial number databases of several American watch companies here:

http://www.nawcc-ch149.com/pw_dbresearch.html

These databases go through the 1930's for Hamilton, at least.

Here is a link to some more old Hamilton catalogs and other information:

http://library.ihc185.com/catalogs/

Hope this helps,
gatorcpa