It took some searching, but I had contact with the grandson of the company "
Johann Kunz Sohne from Kronberg" in Germany, which built the PARX machines !
Nice to find out, that there is also a German built equivalent from the Italian "Maglio Helve" Hammers.
The PARX 49/00 is such a machine (availabe in several versions), which they made a couple of hundred from and were used by Mercedes, Karmann, Magirus etc.
This is a video from a working PARX "Spann-, Polier- and Treibhämmer" machine:
https://www.youtube.com/watch?v=2qnaOWcvmoY
A version mounted on a wall:
https://www.youtube.com/watch?v=cWWuS7m91H0
And another one:
https://www.youtube.com/watch?v=wRAtB4p-Q18
Some printscreens: