Casio C-80 Calculator Watch | Casio watch, Casio, Digital watch
Casio C-80 | Liquid Crystal
Casio Calculator Watches Are Pre-Apple 1980s Icons Still On Sale Today - Bloomberg
Very Rare 1980 CASIO C-70 (133) Japan R Calculator 35mm Watch - New Battery | eBay
Casio C-80 Wrist Watch for Men for sale online | eBay
Casio c80 - Ebuyer Blog
So I have this C80… but on fresh batteries, I can't seem to get any button to work, except the light. All others are unresponsive. I tried poking directly at the module
C-80 (1980) - Casio - LastDodo
Casio Calculator Watches Are Pre-Apple 1980s Icons Still On Sale Today - Bloomberg