GW-M5600-1,Got this GShock GW-M5600 since 2008. Battery went to low only once after I started getting into Seikos. It's my time reference when I set my automatic watches :) : r/BuyItForLife,GW-M5625E-7,Casio G-SHOCK DW-H5600-1JR Bluetooth Solar Men Watch Heart Rate Mobile Link 2023 | eBay,G-SHOCK - Concept | CASIO,