Powerhouse Collection - Two Magic Brain pocket calculators

Mechanical addiator type calculators (2) with stylus, instruction manual and packaging, magic brain pocket calculator, metal / plastic / paper, maker unknown, Hong Kong / Japan, 1950-1960

National Museum of American History

UHF No 70 (Net).indd - Ultra High Fidelity Magazine

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

Steve Jackson Games: Previously Shipped

Healthy habits help preserve brain health, despite genetics

Peter M. Ferenczi

Pocket Calculator

Sections Archives - BusinessWest

Magic Brain Calculator - How to Add

Powerhouse Collection - An 'Exactus Mini- Add' pocket calculating

Powerhouse Collection