Jaap Scherphuis | The Hamann Manus F mechanical calculator @jaapsch2 | Uploaded July 2019 | Updated October 2024, 2 hours ago.
The Hamann Manus F calculator looks like a pinwheel machine, but it actually uses a different mechanism. It's most unusual feature is that it does automatic division.

For more information on the Hamann Manus and the other calculators in my collection, visit my site:
jaapsch.net/mechcalc

0:00 Introduction
0:15 Addition
1:18 Subtraction
2:10 Clearing
2:29 Multiplication
3:42 Division
7:30 History
9:20 Outro