Youtor
The Contex 10 mechanical calculator
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=OWHzdrZjOvc
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/ • 0:00 Introduction, history • 1:09 Description • 1:41 Addition • 2:26 Subtraction • 3:32 Multiplication • 5:13 Division • 9:00 Outro
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