My dad's old DW 5600. He's been working manual jobs all his life and this bad boy went without a bezel for quite a few years till he retired it. It passed
G-Shock module 3229 & 1545 detailed tutorial & user guide on how to setup and use all the functions - YouTube
G-Shock GLS-5600 User Manual / Casio Module 3178
The Complete Buying Guide to Casio G-Shock Watches