Casio - AT-550 - - Montre - Casio AT550 - Casio.ledudu.com - bibliothèque des ordinateurs et des calculatrices Casio de ledudu. - RETRO CALCULATOR FX PB SF LC SL HP FA
Casio - AT-550 - - Montre - Casio AT550 - Casio.ledudu.com - bibliothèque des ordinateurs et des calculatrices Casio de ledudu. - RETRO CALCULATOR FX PB SF LC SL HP FA
![Before Smartwatches, There was the Gesture-Controlled, Touchscreen Casio AT-552 Janus Calculator Watch from 1984 - TechEBlog Before Smartwatches, There was the Gesture-Controlled, Touchscreen Casio AT-552 Janus Calculator Watch from 1984 - TechEBlog](https://media.techeblog.com/images/touchscreen-casio-calculator-watch.jpg)