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…

VINTAGE ADDIATOR DUPLEX Mechanical Calculator with Leather Case £19.75 - PicClick UK

Antique German Slide Mechanical Calculator ADDIATOR subtraction case

Addiator Duplex Pocket Calculator Gold Plated Aluminum

Mechanical calculator (1920)”Addiator” calculator with stylus, carryin

Dark Roasted Blend: Awesome Vintage Calculators

Addiator Slide Adder (Troncet) A Collection of Mechanical Calculators

3 Reasons this Addiator thing I found at a thrift store is totally Blowing My Mind!, by The Brykman Predicament

Addiator mechanical calculator

Angle/Time Calculators

Vintage Arithmetic ruler Calculator Mechanical Slide Addiator 1960s USSR.

Addiator Duplex Pocket Calculator Gold Plated Aluminum