Casio C-80 Wrist Watch for Men for sale online | eBay
Casio C-80 Calculator Vintage Watch Case For Parts NS656MK1 | eBay
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
Watch Vintage Casio c80 Calculator, Chrono, dual time, year 1980 new battery | WatchCharts
Casio Watches for sale in San Diego, California | Facebook Marketplace
Casio C-80 | Liquid Crystal
Casio c80 - Ebuyer Blog
Vintage CASIO C-80 CALCULATOR WATCH FOR PARTS OR REPAIR JAPAN | eBay
Casio C-80; the original smartwatch—Throwback Thursday | Punchkick
Casio C-80 | Liquid Crystal
Vintage Casio C-80 Calculator/ Watch Module 133 First /casio Calculator Watch/ Japan Very Good Condition/ Digital Casio/retro Watchs - Etsy