site. Below is a link to a site of a guy who collects movements, not watches, but just the movements that go into them! The link is to his section on Timex movements and he provides images of the backs of the movements which can make identifying them easy.
technoguy
http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&114&2uswk&