Uploaded January 2021 | Updated September 2026, 2 hours ago

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The Diehl EVM18 is an electrically driven mechanical calculator, with a stepped drum mechanism. It was made from about 1954 till 1962. It has fully automatic division, and semi-automatic multiplication.

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

0:00 Introduction
0:15 Addition
0:37 Manual multiplication
1:14 Automatic multiplication
2:48 Carry mechanism
3:48 Clearing
4:16 Division
5:53 Aborting division
6:55 History
9:23 Outro