On: Old Calculator Web Museum

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The Curta is awesome. Styled as some sort of combination of hand grenade and camera lens. For “maths on the run.”

http://www.oldcalculatormuseum.com/curta2.html

Edit: check out its case and the tear down, it’s so great.

At the end is the ‘Iron Felix’, a Stalin era arithmometer, which is a bit less compact.

http://www.darkroastedblend.com/2008/09/stunningly-intricate...