mutatrum on Nostr: A wonderful mechanical calculator. I had never seen this device before, it's ...
Published at
2023-08-14 14:41:20Event JSON
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"content": "A wonderful mechanical calculator. I had never seen this device before, it's astonishing.\n\nhttps://youtu.be/Vh0NLgbuioE\n\nhttps://en.m.wikipedia.org/wiki/Curta",
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