Magic brain' calculator. C.1955 Science Museum Group Collection

Magic brain calculator in tin and plastic, with stylus and instructions

1950 Vintage Chadwick Magic Brain Calculator Gadget, Mint in Box

Clocks, Watches & Scientific Instruments

A Coefficient of Agreement for Nominal Scales - Jacob Cohen, 1960

File:Vintage Magic Brain Mechanical Pocket Calculator, Made in Japan (11591234036).jpg - Wikimedia Commons

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S SpringerLink

RR Auction: Science and Technology by RR Auction - Issuu

Magic Brain Calculator - A vintage mechanical addiator type

Unopened package Includes instructions, Calculator and Stylus are both metal

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

Genealogy of Artificial Beings: From Ancient Automata to Modern

Cinema Technology Magazine - September 2023 (Vol. 36 No. 03) by Cinema Technology Magazine - Issuu

Vintage Chadwick Magic Brain Calculator on A La Modern