Casio watch. Had it for ~20yrs. It died today but I just replaced the battery and it's back again! I had only changed batteries twice: 10 yrs ago and today. Truly BIFL
How to convert a plain DW-5600 to a negative display | WatchUSeek Watch Forums
Is the Casio G-SHOCK DW-5600 Worth It in 2021? | Everyday Carry
Casio watch. Had it for ~20yrs. It died today but I just replaced the battery and it's back again! I had only changed batteries twice: 10 yrs ago and today. Truly BIFL
RARE 1987! Casio DW-5600C 691 JAPAN H Screwback NEW BATTERY/BEZEL! | eBay