Casio CA-901 Calculator Watch FULL SET

Original Box, Booklet and Retail Swing Tag

The Casio CA-901 is a highly collectible vintage calculator watch released in 1982 that famously features a built-in "Number Invader" arcade game alongside its standard computing functions. 

Powered by Casio's legendary Module 134, this premium watch stood out from basic resin models due to its durable chrome-plated base metal case and matching stainless steel bracelet

Key Features & Modes

The Game (GA Mode): The ultimate selling point of the CA-901. The watch features a variation of Casio's famous "Number Invader" calculator game. Players use the keypad (primarily the + key) to shoot and match numbers moving across the display from right to left, aiming to clear the board and achieve a high score.

8-Digit Calculator: Accessible via a dedicated side button, allowing users to perform standard mathematical operations (+, -, ×, ÷) directly on their wrist.

Audio Alarm & Dual Time: Features a daily alarm alongside a unique audio chip capable of outputting 10 different buzzer pitch tones. It also supports dual-time tracking for secondary time zones.

Chronograph: A standard digital stopwatch mode for measuring elapsed time.