I had reason to go into a small Production Workshop, about 5 or more years back. There, still in use, was a familiar Vertical Turning Mill. Which when I last operated it, in 1964, was even then better that 40+ years old. It having been converted from line shaft drive when it was moved from the Old Factory to the (then) New Factory!. By now it must be better than 100years old!.
Pete.