Uploaded April 2021 | Updated September 2026, 1 hour ago

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The Dacometer 508 is a fairly rare adding machine with a half-sized keyboard, similar to the Contex A/B or the Plus Adder. It was made in Denmark in about 1951.

Video for the Dacometer 908: youtube.com/watch?v=eKTBl7FsBEs

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

0:00 Introduction
0:33 Addition
1:26 Clearing
1:44 Opening case
2:35 Keyboard mechanism
3:46 Carry mechanism
5:57 Outro