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  1. Feb 2022
  2. www.scientificamerican.com www.scientificamerican.com
    An Ancient Greek Astronomical Calculation Machine Reveals New Secrets
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    1. chrisaldrich 13 Feb 2022
      the first precision-geared mechanism known is a relatively simple—yet impressive for the time—geared sundial and calendar of Byzantine origin dating to about C.E. 600.

      The first known precision-geared mechanism is a sundial and calendar of Byzantine origin dating to circa 600 C.E.

      mechanical computing astronomy Byzantine precision-gearing mechanical engineering sundials calendars
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    scientificamerican.com/article/an-ancient-greek-astronomical-calculation-machine-reveals-new-secrets/