Direct from Japan] Casio G-Shock 3159 Gw-M5610Bc | eBay
Casio 3159 Module - GW-5000 series test screen, function explanation, watch set up - YouTube
Casio G-Shock Protection TOUGH SOLAR 3159 GW-M5610 Digital Watch READ | WatchCharts
CASIO G-SHOCK 3159 #XR685C for sale online | eBay
Time Adjustment 3159
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