Steve, I see you are a middle man. S. sent me a personal e-mail that I just responded to then opened BOCN and saw this. LuckilyI agreed with what was said on the thread. I have seen the marking on known Swedish ordnance but none of my Swedish manuals nor my Swedish dictionary of technical and military acronyms has it listed. I have been in discussions in the past as to whether it is ADK or DAK, but since I can't find either I may never know. My guess, like the previous one in the thread, is that it is the mark for Karlsborgfabriksverk or Ammunitionsfabriken (Amf) Karlsborg or Karlsborg Arsenal, pick a timeframe. I did see a listing of a Karlskrona "Karlsborg" Naval Arsenal, Karlskrona, Blekinge which is in southern Sweden. Might explain the anchor, but I know nothing about it. Hopefully someone will come up with the real story and get me out of this mess of guessing.