Hi @Andrewolf79 and welcome to the forum.
I recently acquired a copy of the U.S. Army Ordinance Maintenance manual for issued clocks, pocket watches and wrist watches (aka TM 9-1575 c.1945). A digital copy can be viewed here:
https://archive.org/details/TM9-1575
It's very organized and is full off definitions, tool indexes and illustrations of various sub-assemblies, etc. While make/model specific, I found it very helpful in learning basic concepts and procedures. The tool lists are very comprehensive as well.
Hope this helps,
C