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…

Mechanical Calculator - Singapore

Addiator' calculating machine, c 1924.

John Wolff's Web Museum - Slide Adding Machines

Addiator calculator with stylus and pencil

Addiator calculator; Addiator Gessllschaft; 1920's - 1930's; r17457

Add Addiator Subtract Calculator Mechanical-20 Inch by 30 Inch Laminated Poster with Bright Colors and Vivid Imagery-Fits Perfectly in Many Attractive Frames : Office Products

Shady Characters advent calendar 2023: the addiator – Shady Characters

Pocket Mechanical Calculator - Addiator/Addifix

Addiator - Mechanical Calculators