By A Mystery Man Writer
Vintage Calculators, Vintage Electronics, Consumer Electronics - PicClick CA
Magic Brain: Last Gasp of the Mechanical Calculator
Magic-Brain Calculator (2) - Calculator - Computing History
2 Vintage Manual Calculators. 1 is Chadwick Magic-brain Calculator 1950- 1960's
American Stationer, antique & vintage staplers, adding machines, hole punches, check protectors, calculators, pencil sharpeners, scales, tape dispensers and all other office equipment
Miscellaneous
Magic Brain Calculator, c. 1950-1969 - Machine, Calculating
Magic Brain Calculator - How to Divide
adding machine American Stationer