Jaap Scherphuis | The Addimult Ziffrex adding machine @jaapsch2 | Uploaded March 2020 | Updated October 2024, 5 minutes ago.
The Addimult Ziffrex is a bulky adding machine made in Germany in about 1957 or 1958.

For more information about this and other mechanical calculators in my collection, visit my website:
jaapsch.net/mechcalc

0:00 Introduction, History
1:24 Addition
2:52 Clearing
3:16 Subtraction
4:47 Lack of patent information
5:42 Outro