The Antikythera mechanism ... fragments of the crust-encased mechanism and read the faintest inscriptions that once covered the outer casing of the machine. This suggests it had 37 meshing bronze ...

[Dave] builds custom wooden orreries, which are mechanical models of the solar system. It’s no surprise then that he’s interested in the Antikythera Mechanism—a small geared device ...

Granted, not every artifact was as complex as the Antikythera mechanism, but still ... There must have been a source of heat for working the brass and bronze materials of the original.