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Very used GW-6900 vs new 5610U legibility comparison
(sh.itjust.works)
A community dedicated to Casio G-Shock (gshock.com) watches.
I've heard the EL backlighting makes the LCD a bit less legible. I don't know if that is true but I do appreciate the legibility of the 5610U, especially when wearing it on the inside of the wrist like I do.