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
SPF: Casio G-Shock "Oak" GA2100-1A1 - All Black | WatchUSeek Watch Forums
G-Shock GA-2100 / 5611 / Octagon Form in a Slim 11.8mm Case
Casio G Shock Module No. 5611, Men's Fashion, Watches & Accessories, Watches on Carousell
New in Box - Men's G-Shock Casio 5611 Ryo Ishikaw Watch - running | eBay