This Little Giant Adding Machine was made in the 1940s by the Kel-San Manufacturing Company in Dayton, Ohio. The first version was made in the late 1920s without the wooden casing. It is a simple machine with a 5-digit register and no clearing mechanism.
Thanks to Stephen Freeborn ( https://www.youtube.com/@stephenfreeborn/videos ), from whom I bought this Little Giant. He also made a video about this machine:
https://www.youtube.com/watch?v=zy2BnVfPHR0
For more information about this and other machines in my collection, please visit my website:
https://www.jaapsch.net/mechcalc/
0:00 Introduction
0:36 Clearing
1:04 Entering/adding numbers
1:48 History
3:21 Outro