The main problem is the scallops.
The Germans may not have had advanced technology but they and just about every other machinist of that time period had a V shaped slot cutter that was mounted in a horizontal mill.
To get the shape of the scallops perfect with rudimentary equipment you would not only have to have a cutter with the correct shaped teeth but it would also have to have the exact same radius.
This type of cutter isn't used much in today's shops and they are nearly impossible to find. You would have to have a cutter custom made and it would cost in the thousands of dollars.
The modern day way to cut the shape of this scallop is with a very small ball mill and a 5-axis milling machine that can basically carve the shape in multiple passes.
But that's something most lay people wouldn't know or understand so I won't hold that against you.
Here is an example of a fluted pilaster from that period cut with a similar wood working tool