Hi Christian,
You are right, I have indicated them as Eugen Huber AWM because my pig skin holster is stamped Eugen Huber ... AWM /1 / 15 but it is impossible from the picture clarify the kind of leather used.
I have associated to my Eugen Huber also the magazine pouch Eugen Huber and AWM stamped in pig skin but I do not have the leather attaching part. Personally I guess that they are made from standard leather but it is only my guess.
Hereafter a picture I hope can help you. I guess the historical picture is from George Anderson. You can see a 1915 Mars but it is difficult to understand about the leather type of the others parts.
Maybe your eyes are better than mine.
pigskin.jpg
Ron,
Unfortunatly the photo is undated therefore I cannot be more precise.
Have fun,
Mauro