I picked this up in an antique shop when I was a kid, maybe 15 years ago. I guess I lost the stylus along the way.

Here’s the clear bar pulled:

Instructions:

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[–] 8 points 1 year ago

I had one of these decades ago, wish I still had it. Brilliant little gadget.

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  • [–] 5 points 1 year ago

    Troncets are such adorable minimalist devices. Like an abacus you don't have to think about. The sort of thing that could have existed a thousand years ago, but wasn't developed until after the comptometer.

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