The Addo Model 2 adding machine

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:
www.jaapsch.net/mechcalc/
0:00 Introduction
0:22 Entering numbers
1:04 Addition
1:33 Carry
2:05 Clearing
2:28 Outro

[@kinderferrer591]

Fascinating video! I really like the clings and clangs of the calculators. These videos are invaluable and super interesting, please please never stop making them and keep them coming!

[@pepn]

i too am just in love with the ADDO-X now

[@stephenfreeborn]

That is a particularly clacky device.