Uploaded May 2022 | Updated September 2026, 3 hours ago

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The Brunsviga 11S is an electrically driven mechanical calculator. It is similar to the Brunsviga 11E but with a full keyboard instead of input pins. It has automatic division.

Video of the mechanism:
youtube.com/watch?v=5unqPg0UtWY

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

0:00 Introduction
0:21 History
1:32 Addition
2:13 Subtraction
2:30 Clearing
3:04 Multiplication
4:52 Division
6:20 Outro