The MagicBrain Calculator was manufactured in 1955 by the Chadwick Company, this early calculator was operated using a stylus, and could perform addition, subtraction and multiplication calculation
Magic-Brain Calculator (2) - Calculator - Computing History
Vintage 1960's Magic Brain Pocket Calculator W/Stylus, Made in Hong Kong - Unopened package Includes instructions, Calculator and Stylus are both
Vintage 1960's Magic Brain Pocket Calculator W/Stylus, Made in Hong Kong
The Magic Brain Calculator – I Remember JFK: A Baby Boomer's
Marketing ROI Calculator Calculate Return On Marketing
Put your brain to the test with this interesting number puzzle
A Mathematician Asks 'Is Math Real?
Force Calculator Magic Trick on the App Store
One Hit Wonders
Vintage Chadwick Magic Brain Calculator. Made in Japan Mid
Magic Brain Calculator - How to Subtract
Vintage Magic Brain Mechanical Pocket Calculator, Made in Japan
Calculator - Wikipedia
help.apple.com/assets/6598817BD84F513BE609FC12/659
Vintage Chadwick Magic Brain Calculator on A La Modern