Pocket Mechanical Calculator

Thread starter Hornbein
Start date Aug 16, 2026

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Hornbein

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Aug 16, 2026

Designed in the 1880's, popular in the 1920's through 60's. Subtraction by turning it over to get a different display on the other side. Division is tricky and takes skill. Made in Germany.

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Filip Larsen

Gold Member

Aug 16, 2026

For another great example of a somewhat more mechanical complicated, but also more powerful calculator take a look at the Curta:

Pocket Mechanical Calculator

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