Casio G-Shock GW-S5600 review & 3159 module tutorial (also works for GW-M5610 & GW-5000) - YouTube
Ordered the 5610-1 with the older 3159 module, received the 5610U-1CF with the newer 3495 module. I'm not complaining, and I only paid $90 👍 : r/ gshock
G-Shock GW-M5610 / 3159 / Clásicos inmortales con energía solar y precisión de radio