Addiators A Collection of Mechanical Calculators

Addiators, or troncets, are simple adding or adding/subtracting devices which operate via a system of slides usually operated with a stylus. They are also commonly known as slide adders. Addiators are strictly speaking just one of many brands of slide adder, but the term "Addiator" has been adopted as the generic term for all such…

Addiator mechanical calculator

Vintage Arithmetic ruler Calculator Mechanical Slide Addiator 1960s USSR.

Mechanical calculator - Wikiwand

Vintage Arithma Addiator with Stylus ~ Made in Germany!!!!!!

What is this brand? This is an Addiator-style pocket mechanical calculator I just got, and I'm interested to know about how old it might be, but the only identifying marking is this

Powerhouse Collection - Addmaster calculator

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John Wolff's Web Museum - Slide Adding Machines

Shady Characters advent calendar 2023: the addiator – Shady Characters