1950's Calculator Magic Brain Vintage Personal Computing on eBid United States

Magic Brain Calculator - A vintage mechanical addiator type

1964 Rose's Lime Juice Magazine Advertisement on eBid United

Unopened package Includes instructions, Calculator and Stylus are both metal

Vintage 1960's Magic Brain Pocket Calculator W/Stylus, Made in Hong Kong

Magic-Brain Calculator (2) - Calculator - Computing History

National Museum of American History

Magic Brain Calculator - A vintage mechanical addiator type

National Museum of American History

Magic Brain Calculator - How to Add

Magic Brain: Last Gasp of the Mechanical Calculator

Tracing the history of electronics through the Old Calculator Web