Jaap Scherphuis | Brunsviga Nova II mechanical calculator @jaapsch2 | Uploaded February 2019 | Updated October 2024, 7 minutes ago.
The Brunsviga Nova II is a pinwheel calculator made by Grimme, Natalis & Co from 1925 to 1934.

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

0:00 Introduction, History
1:24 Addition
2:05 Multiplication
2:56 Clearing
3:37 Subtraction
4:12 The counter
6:14 Back transfer
7:13 Outro