Uploaded March 2024 | Updated September 2026, 1 hour ago

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The Addo Model 2 adding machine was made in Sweden from 1920 to 1926. It is similar to the Comptator but with a ripple carry mechanism, and mounted on a wooden stand.

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

0:00 Introduction
0:22 Entering numbers
1:04 Addition
1:33 Carry
2:05 Clearing
2:28 Outro