The Summira S printing adding machine
Channel: Jaap Scherphuis
Date: 05/08/2022

The Summira S is a version of the Summira 7 adding machine but with a printer mechanism at the back. Pulling the large handle will cause the current input to be printed, either in black or in red depending on whether subtraction mode is selected.

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

0:00 Introduction
0:19 Addition
1:02 Clearing
1:32 Multiplication
2:23 Subtraction
3:28 Printing
6:20 Printing mechanism
8:06 History
8:34 Outro