I doubt that. I believe that we have found multiple written references to what we now know were Antikythera devices.
I'm sorry but what point that I made are you doubting? The expense of creating the mechanism or its functioning? What references are you citing? I'm not disputing just curious.
There are ancient descriptions of similar devices. Historians tended to dismiss these accounts as exaggerations, but this example gives such accounts credence. It is unlikely that the Antikythera mechanism was unique.
It was most likely more a novelty than anything practical.