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 Module 3159 Watch Movement | Caliber Corner
Casio G-SHOCK 3159 Tough Solar GW-M5610 No.8881 | eBay
CASIO G-Shock GW-M5610NV (Model 3159) Military UTC Multi Band 6 Navy 2016 - YouTube