The Walther WSR-160 mechanical calculator
Channel: Jaap Scherphuis
Date: 10/07/2020

The Walther WSR-160 is a pinwheel calculator made from 1956 until 1968. Mine is probably from 1967 or 1968. It has a back transfer mechanism, and all its controls are on the right hand side so that it can be operated with only one hand. I forgot to point out in the video that the input pins don't move when you turn the crank.

I also have a video about a much older Walther machine, the Walther RMKZ:
https://www.youtube.com/watch?v=GbgZHEsfpaM

For more information on this and other calculators in my collection, please visit my site:
https://www.jaapsch.net/mechcalc/

0:00 Introduction, History
1:47 Shifting carriage
2:11 Addition
2:31 Multiplication
2:54 Clearing
3:03 Automatic shifting
3:42 Counter direction
4:14 Division
5:50 Shortcut division
7:42 Back transfer
9:04 Resetting clearing selection
9:39 Model, Serial number
10:33 Releasing carriage
10:58 Outro