MANUAL | PRO TREK - Mens Watches - CASIO CASIO PRO TREK Official Website MANUAL page. MANUAL. WATCH MANUAL ARCHIVES. Use this page to download a copy of CASIO watch manuals in PDF. To download a PDF file, enter the four-digit (or three-digit) module number marked on the back cover of your watch. MODULE NO. ProTrek Watch Manuals in PDF for all Models Aug 31, 2017Official Casio ProTrek Watch user instruction Manuals in PDF format. You can also choose search by module number. We will easily help you to get the ProTrek Manual you need.