An interesting video describes how it was most likely done. For all, you watchmakers and mechanical engineers, and mathematicians that think the ancients were stupid and neanderthals. Enjoy!
On the first page click on the read more, once on the second page at the bottom of the first paragraph, click on the highlighted here, for the 11-minute video link. That will take you to the ARS Technica site and video.
https://www.skywatchtv.com/2021/04/06/antikythera/
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