Uploaded May 2020 | Updated September 2026, 9 hours ago

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The Badenia TH13 is a mechanical calculator with a stepped drum mechanism. This model was made throughout the 1930s, and this particular one was made in around 1936 or 1937. Badenia was a brand name of the Matthias Bäuerle company, based in St. Georgen in Germany.

For more information about the Badenia and other calculators in my collection, visit my site:
jaapsch.net/mechcalc

0:00 Introduction, History
2:48 Addition
3:18 Multiplication
4:50 Subtraction/Division controls
6:17 Clearing
6:33 Outro