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
Casio G-Shock 3159 Gw-M5610Bc used Free Shipping From Japan | eBay
上品】 g-shock 3159 ja 腕時計(デジタル) - willowrockbrew.com