Magic Brain Calculator, #772169
Group of Vintage Adding and Numbering Machines
Magic brain' calculator. C.1955 Science Museum Group Collection
Magic-Brain Calculator Smithsonian Institution
National Museum of American History
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. C.1955 Science Museum Group Collection
Magic Brain: Last Gasp of the Mechanical Calculator
Vintage Magic Brain Pocket Calculator W/Stylus, Made in Hong Kong
Magic Brain: Last Gasp of the Mechanical Calculator