I got this watch recently. The GWS-5600. Module #3159. The image isn't mine but I wanted to share how comically light the watch is. 47 grams! I just wanted to share that
Casio G-shock 3159 Black Gw-m5610 Quartz Digital Watch for sale online | eBay
G-Shock GW-S5600U-1JF Carbon Fiber Atomic Origin S5600 Series