The Contex 10 mechanical calculator
The Contex 10 was made by the Carlsen Brothers in Denmark from 1957 to 1971. About a million or them were made. In this video I show how to use this machine to do addition, subtraction, multiplication, and division.
For more information about this machine and other mechanical calculators in my collection, visit my website at https://www.jaapsch.net/mechcalc/
Видео The Contex 10 mechanical calculator канала Jaap Scherphuis
For more information about this machine and other mechanical calculators in my collection, visit my website at https://www.jaapsch.net/mechcalc/
Видео The Contex 10 mechanical calculator канала Jaap Scherphuis
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