"Are those ones like engines/machines art works too?"
They are not (works of art), as the post says, there have been two visits, one to the Botero museum and the other to the mint museum; in the latter, these machines are presses where legal tender coins were printed at the time when they were in operation.
Thank you very much for your comment, which has prompted the appropriate clarification.
Thank you and best regards
Thanks for the explanation,
You are welcome..!