Uploaded May 2026 | Updated September 2026, 3 hours ago

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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 ( youtube.com/@stephenfreeborn/videos ), from whom I bought this Little Giant. He also made a video about this machine:
youtube.com/watch?v=zy2BnVfPHR0

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

0:00 Introduction
0:36 Clearing
1:04 Entering/adding numbers
1:48 History
3:21 Outro