I have seen that rustication on a Proctus stamped pipe. I think they may be Bari second lines or some Denmark factory pipe. So the Kriswill connection seems likely to me.
Thank you so much! Finally a breakthrough! You are absolutely right, this is what I found:

This is a Proctus De Luxe pipe. I also confirmed the connections with Bari, Viggo Nielsen and Kriswill. 98% there. I also managed to decipher the brand name and possible production year - Gunnvil, ~1970. 99% there, but German Google finds absolutely nothing yet again…
Maybe if someone from Denmark could google it in danish, we could get it.