Very Rare 1980 CASIO C-70 (133) Japan R Calculator 35mm Watch - New Battery | eBay
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Casio C-80 | Casio watch, Casio vintage watch, Casio
VINTAGE CASIO C-80 FIRST CALCULATOR MODULE 133 JAPAN R MEN'S WATCH 1980's, WORK | eBay
Casio C-80 Calculator Watch Module 133 First Casio Calculator - Etsy
Hands-On: Yes, You Can Still Buy A Casio Calculator Watch - Hodinkee
Casio C-80 Calculator Watch Module 133 First Casio Calculator - Etsy
Vintage 1980's Casio C-80 133 Digital LCD Calculator Watch - Etsy
Casio C-80 Running Wild - YouTube
C-80 (1980) - Casio - LastDodo
Casio C-80 - YouTube
Casio C-80 | Liquid Crystal
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RARE Vintage 1980 Casio C-80 Digital Calculator Watch, Made in Japan, Module 133 | WatchCharts
Casio C-80 Calculator Module 133 Vintage Watch Case For Parts MUS34AMD1 - Watches Pool
Casio C-80 Digital Calculator-Watch : r/PixelArt
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
CASIO - C-80 - Calculator - Vintage Digital Watch - Digital-Watch.com
Casio C-80 Calculator Vintage Watch Case For Parts NS656MK1 | eBay
Tech Hunters: Refreshing Casio's classic calculator watch | Engadget
