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Chadwick Magic Brain calculator

Chadwick -- Magic Brain Calculator (It was built in Japan) .item LCSO: Deputies Arrest Man for Stealing Scrap Metal -- a total of pounds of metal from the fenced lot owned by Grimes.

vintage mechanical calculators

The Inner Workings of Antique Calculators Dramatically Photographed by Kevin Twomey vintage technology machines

The Pascaline, invented by Blaise Pascal in France in 1642, was a mechanical calculator that could add and subtract directly.

The Pascaline, invented by Blaise Pascal in France in was a mechanical calculator that could add and subtract directly.

Mid Century Sumit Adding Machine. $49.00, via Etsy.

Mid Century Sumit Adding Machine. $49.00, via Etsy.

Stepped reckoner four-function calculator  Gottfried Leibniz (1673).

1673 stepped reckoner four-function calculator Gottfried Leibniz

Curta Mechanical Calculator, a small, hand-cranked mechanical calculator introduced by Curt Herzstark in 1948. It can be used to perform addition, subtraction, multiplication, division, and (with more difficulty) square roots and other operations. considered the best portable calculators available until they were displaced by electronic calculators in the 1970s.

Curta Mechanical Calculator, a small, hand-cranked mechanical calculator introduced by Curt Herzstark in 1948. It can be used to perform addition, subtraction, multiplication, division, and (with more difficulty) square roots and other operations. considered the best portable calculators available until they were displaced by electronic calculators in the 1970s.

Rarts Mechanical Slide & Rotary Adders Addiator ANTIQUE Calculator brass V fine

Rarts Mechanical Slide & Rotary Adders Addiator ANTIQUE Calculator brass V fine

Old School Calculator Add Subtract and by VintageRetrievers, $12.95

Old School Calculator, Add, Subtract and Multiply with Stylus

Expo '58, Brussels World's Fair: Before Texas Instruments, there was the mechanical calculator, this one from the fair with an image of Atomium at the top.

Expo Brussels World's Fair: Before Texas Instruments, there was the mechanical calculator, this one from the fair with an image of Atomium at the top.

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