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
Manual For Casio G-Shock GA-2000E-4DR Analog-Digital With Carbon Core Guard - Module 5590 | PDF | Timer | Daylight Saving Time
How to Setting Time Casio G-Shock GA-2000 Caliber 5590 Watch - YouTube