Re: WW II Walther PP holster question.
AKAH (Albrecht Kind) was and is a German sporting goods company, like Cabela's. Many members of the German armed forces and Nazi organizations purchased their holsters. But AKAH didn't really make anything (again like Cabela's), so most of the military contracts went to the actual makers, not to retailers like AKAH.
DRGM (Deutsches Reichs Gebrauchsmuster or, loosely, German Registered Design) is like "Patented"; it can appear on anything made by anyone.
Jmace57, are you sure those letters are not "hsu" which would be Sparfeld, Leipzig. That was one of several leather and equipment companies that inspector 170 was responsible for. For large factories, like Mauser or Krupp, the WaffenAmt had a full time inspection team and the number represents the team commander. But where several small contractors were in the same area, they brought thier products to a central point for inspection and acceptance (and receipt of payment vouchers), so all the products had the same inspector's number.