What's inside the Casio G-Shock GA-2100? Check out the Carbon Core Guard and the 5611 module. - YouTube
G-Shock GM-2100 User Manual / Casio Module 5611
G-Shock GA-2100 / 5611 / Octagon Form in a Slim 11.8mm Case
Just bought my first g-shock (GM-2100MF). Love the way it looks but concerned it's a fake. The internal module number (during testing mode) shows up as 5590 instead of 5611. Anybody else
How To Setting FULL TIME G-SHOCK GA-2100 Modules 5611 | How To Setting FULL TIME G-SHOCK GA-2100 Modules 5611 | By SolimBD | Facebook
GShock 5611 Day of the Week is Wrong | WatchUSeek Watch Forums