Uploaded March 2020 | Updated September 2026, 6 hours ago

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The Add-em is a toy adding machine made by the Western Stamping Co. in the late 1950s or early 1960s. It has a 3-digit register, and simply 3 buttons to increment the digits.

To see the ingenious mechanism, see this other video:
youtube.com/watch?v=Yxu-selscMQ

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

0:00 Introduction
0:16 History
1:07 Adding
1:28 Carry mechanism
1:52 Clearing
2:10 Outro