Vintage Watch Hunter - We've got a beautiful Casio C-801 in steel for sale this week. This watch is exceedingly rare and one of the first calculator watches in the world. DM
X - Casio C-801 Digital Calculator Module 133 For SPARE PARTS / REPAIRS (3) - G-Shock Vintage
VINTAGE CASIO C-801 CALCULATOR MEN WATCH JAPAN MADE Corrosion asis for parts | WatchCharts
X - Casio C-801 Digital Calculator Module 133 For SPARE PARTS / REPAIRS (1) - G-Shock Vintage
Casio C-801 Black Calculator Watch Module 133 Nerd 80's - Etsy India
Casio C-801 Calculator Watch REBUILD - Ep 62 - Vintage Digital Watches - YouTube
Casio C-801 | Liquid Crystal
Vintage Casio Calculator Watch Model C-801 Made In Japan Works Good Functional – St. John's Institute (Hua Ming)