What year is this Casio? Serial number/I.D. meaning | WatchUSeek Watch Forums
CASIO G-SHOCK G-Shock Casio Watch DW-8200NT2-4JR Frogman FROGMAN 2000 Reprint No Serial Master of G AD Special Model Red LCD Diving Frog | eLADY Globazone
Is this G Shock fake? Can't find any serial numbers on the back of it and on the inside. : r/gshock
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Which is the serial number? | WatchUSeek Watch Forums
CASIO SERIAL NUMBER AND MANUFACTURING DATE | WatchUSeek Watch Forums
How to register any casio watch or any other product on casio's website? - YouTube