IEEE - When Casio popularized the calculator watch in the 1980's, it revolutionized both fashion and technology for that era and made a huge impact on the wrist tech sector. Now, Apple
Vintage Watch Hunter - Super rare 1985 Casio CFX-400 on eBay, no reserve! Dont miss out on Casio's first scientific #calculator. ⌚⌚🔥🔥 #calculatorwatch #casioholic #casiowatches #casiovintage #casiothailand #vintagecasio #casiocalculatorwatch ...
Vintage CASIO CFX - 400 watch - Scientific calculator - Collectible - price reduced to $550 | WatchUSeek Watch Forums
![Saturday watch here, Casio made some great lines of timepieces, but the calculator watches are probably the most recognized, this one is the Casio CFX-400! Capable of normal timekeeping, it was a Saturday watch here, Casio made some great lines of timepieces, but the calculator watches are probably the most recognized, this one is the Casio CFX-400! Capable of normal timekeeping, it was a](https://i.redd.it/2kiylv521qb61.jpg)