DBC-1500] A 90s calculator watch. Never used. Seems to have a metal case. Heavy thick metal band. None of the buttons work. Will crack open again to see what I did wrong
Casio DBC-1500 Data Bank Digital Calculator Wrist Watch Module Vintage Japan | eBay
Casio Databank - Wikipedia
Vintage Casio DBC-1500 Module 1477 Watch. Very Nice - Etsy