The Curta is a hand-held mechanical calculator designed by Curt Herzstark. It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.
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The legendary math grenade
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If you have a 3d printer you can make your own 3:1 scale Curta Type 1.
I actually have one of these! marvelous piece of technology
Have you taken it apart yet to see how it works…
Would this be the first “pocket calculator?”
The machines have a high curiosity value; in 2016 they sold for around US$1,000, but buyers paid as much as US$1,900 for models in pristine condition with notable serial numbers.
Aw, man. Guess i’m not gonna have a cool math grenade for my desk.
Edit: Here’s a Numberphile video about it:
