Uploaded March 2020 | Updated September 2026, 1 hour ago

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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