RetroCalculators's channel

Quick display of the gear action of the Monroe Model L - how it runs with the carriage and covers off.

How to open up the the Monroe LX-160 Mechanical Adding Machine (unedited and unpolished!).

Peek inside this cool old mechanical calculator -- the Tiger! Made in Japan, it's an imitation of a European design c 1940.

See the elegant workings of this primitive mechanical counter from the civil war era in action. Visit RetroCalculators.com

See how these old hand-cranked calculators worked! Demonstration of Pilot P-1 antique mechanical calculator circa 1961.

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Demonstration of a cool old 'Golden' Odhner all-brass antique mechanical calculator circa 1937.

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Much more than a slide rule! Check out this demonstration of a Addiator + slide rule combo. Faber Castell adder from 60 years ago.

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Witness the jaw-dropping ingenuity of this fascinating hand-held mechanical calculating machine.

Ever wonder about the abacus? This venerable classic is surprisingly easy to use. Check out this brief demo!