This mechanism was discovered in 1901, in a Roman era shipwreck, off the Greek island of Antikythera, which is a bit north of Crete.
It has been dated to between 100BCE and 205BCE, with the older date considered the best estimate. ie, about 2200 years old. Experts believe that its makers were Greek.
It is currently housed in the Greek National Archeological Museum in Athens.
Look it up on Wikipedia..
According to the Wikipedia entry the gear teeth are too irregular to have been machine cut,
but watch the computer reconstruction. Could you make this machine without a lathe and gear cutters?
How much more technology did the ancients have that has not survived the ravages of time? A lathe for example.