Hi Jerry,
Boris over on Jan's Gun Boards had this photo posted in one of the Radom discussions. I think the discussion mentioned the Polish civil defence in the early 1939 time frame.
You might ask Boris if he has the original photo that he could take a high-rez scan for you. You might have your answer that way...
You can send him an email through the profile feature :
http://luger.gunboards.com/pop_profi...isplay&id=2624
I enlarged the photo jpeg he posted, but it does not show the strap in enough detail...sorry...