ViewTube

This toy adding machine was sold by Montgomery Ward in the second half of the 1960s. The label Signature Junior label was ...

The Addo Primary Calculator is a simple toy adder. It was made in 1964 by the British branch of the Swedish Addo company ...

00:00 Body Disassembly 00:16 Addition 00:24 Subtraction 00:35 Repeated addition 00:45 Multiplication The Multisumma 20, ...

00:00 Body Disassembly 00:14 Addition 00:24 Subtraction 00:36 Multiplication 00:50 Division The Divisumma 14, introduced in ...

The Seidel & Naumann Adding Machine, or SuN Adder is a chain adder. It was made in Dresden, Germany, between 1910 and ...

The Facit CA1-13 is a fully automatic electromechanical calculator. Facit made their first fully automatic calculator in 1945, and that ...

This beast of a machine is the Rheinmetall SASL mechanical calculator. It has fully automatic multiplication and division, and a ...

The Contex 30 calculator as made by the Brothers Carlsen in Denmark from 1963 till 1971. It was a relatively cheap electric ...

The Olympia AE-8 is an adding machine from 1967. It is fairly unremarkable, with a standard keyboard and controls. For more ...

The Summira 7 is a small adding machine. It can do direct subtraction, and was made in West Germany from about 1955 to the ...

This video explains the function of the mechanical integrator, a mechanism crucial to the development of mechanical analog ...

Roy Kilgard demonstrates multiplication with the 1890s era Millionaire mechanical calculating machine.

The Contex 10 was made by the Carlsen Brothers in Denmark from 1957 to 1971. About a million or them were made. In this ...

The Precisa 364 is an adding listing machine that can also do multiplication. It was made from 1963 to 1978. The Precisa 160 is ...

The Stima CM-III Adding Machine was made in Switzerland from 1930 till the late 1940s. If you use a stylus to enter a number on ...