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Electronic Calculators—Handheld
Magic Brain Calculator, c. 1950-1969 - Machine, Calculating
OMNIA - calculator
Victor 620 Vintage 1970s Desktop Calculator W Manual
National Museum of American History
JF Ptak Science Books: Future, History of the
ENIAC - Wikipedia
Vintage 1960's VANGUARD Magic Brain Calculator Japan NOS
Unopened package Includes instructions, Calculator and Stylus are both metal
Vintage 1960's Magic Brain Pocket Calculator W/Stylus, Made in
National Museum of American History
Magic Brain Calculator - How to Add
Unopened package Includes instructions, Calculator and Stylus are both metal
Vintage 1960's Magic Brain Pocket Calculator W/Stylus, Made in
Powerhouse Collection - Two Magic Brain pocket calculators