Magic-Brain calculator

from 1962 buying, selling or collecting? Manage your Mechanical calculators collection in the catalogue on LastDodo.

National Museum of American History

John Wolff's Web Museum - Slide Adding Machines

Santa Cruz Biotechnology (SCBT) - 1960's Magic Brain Calculator

2 Vintage Manual Calculators. 1 is Chadwick Magic-brain Calculator

Magic Brain Calculator Drawing by CSA Images - Fine Art America

Magic Brain Instructions

Calculate numbers by using the metal stylus to slide the rows. Great condition! , 5 3/4” x 3 1/4”

1960’s Chadwick Magic Brain Calculator

Found this old calculator in my great grandmother's attic : r

Slide calculator - Wikipedia

Magic Brain: Last Gasp of the Mechanical Calculator

Magic Brain Pocket Calculator, 1950-1960 - Made in Hong Kong

Mesmer in pillole - Episodio 284 - Il Magic-Brain Calculator