basic mechanical clocks go back a long time.

Ok, and how far back do mechanical clocks used for computing mathematical problems go? And no, standard mechanical clocks (even impressive ones, like the more ornate mayan designs) are not “computing” mathematical problems

I wouldn't even call OOParts to be really a conspiracy theory, since there's never really any conspirator named. It's more fringe archaeology.

The “conspiracy” is in the response of the {mainstream} academia/press/narrativeshapers. Or have you never heard of scientists like Schoch, Bauval, Carlson (& Hancock), Sheldrake, Pons, or literally anyone else who’s entire careers were railroaded for approaching a “fringe”?