The Walther RMKZ calculator
Channel: Jaap Scherphuis
Date: 2017-07-16

The Walther RMKZ is a mechanical calculator of a standard Odhner pinwheel type.

It would have been black originally. The hammer grey enamel was probably added in the 1950s or 60s when that was fashionable.

For more information, visit my website:
https://www.jaapsch.net/mechcalc/

0:00 Introduction, history
1:31 Addition
2:25 Subtraction
3:12 Clearing
3:39 Overflow bell
4:38 Multiplication
6:12 Shortcut multiplication
7:09 Division
9:58 Outro