It is unclear how advanced ancient Greek technology was. It is estimated that we currently know about 10% of ancient Greek scientific writing. And there is no r

It is unclear how advanced ancient Greek technology was. It is estimated that we currently know about 10% of ancient Greek scientific writing. And there is no reason to believe we have seen the top 10% of their science. For example there is nothing in the currently known ancient Greek scientific writing that prepares us for an automaton as complex as the Antikythera Mechanism. The quality and complexity of the mechanism points to the existence of sophisticated manufacturing processes. Moreover, given that the Antikythera Mechanism was found on a fairly hum-drum boat, there is no reason to believe it represents the best of ancient automata making.