The Kohner Easy Adder
Channel: Jaap Scherphuis
Date: 2023-09-23

The Easy Adder by Kohner is a toy adding machine from the mid 1960s. It has a single dial like an old rotary phone with which you can add a digit to the total. It can also subtract.

Stephen Freeborn has a nice video of this machine: https://youtu.be/p_ilVETlMV4?si=gzvYTw1HJP2wqkfP

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

0:00 Introduction
0:16 Addition
0:46 Subtraction
1:21 Clearing
2:27 Mechanism
4:51 Outro