Navy manual for instrumentmen(watch and clock repair) first edition 1949.

This edition 1962.
Well laid out instructions on navy watch and clock repair (typewriters too!), pdf and internet viewable.

http://files.eric.ed.gov/fulltext/ED082050.pdf

https://babel.hathitrust.org/cgi/pt?id=uc1.$b308401;view=2up;seq=1