Probably a Model XVII and a nice "dolled-up" workhorse with the 3 Ringe Krupp tubes. I assume it has ejectors? It seems there weren't that many of them and they seem to all have that set screw paired with the screw in the floor plate. Top screw is typically overhanging scears/Abzugsstange and the lower are intercepting/Fangstangen. The nose of the overhanging interfaces with the top of the hammer. What are the initials on the water table FW/TW?

Kind Regards,

Raimey
rse