User Manual for Casio Watch Module - Owner's Guide Casio Watch Manuals. This reference library contains over 1,500 Casio watch manuals. You need to look up the module number of your watch to find the right one. It should be engraved on the case back. Find that number in the list below to view the owner's guide and instructions for that watch. my g-shock wristwatch blog, news, and reviews G-Shock Watch Manuals in PDF for all Models Aug 31, 2017Official Casio G-Shock Watch user instruction Manuals in PDF format. You can also choose search by module number. We will easily help you to get the G-Shock Manual you need.