WWII Walther P38 "AC41" bringback in Luger P08 Holster

[FergusandCo]

I posted the following in the Walther Forum, but thought someone here might have an eye for some of the markings in the pictured P-08 Holster. I'm a first time poster, here, and am grateful for any helpful comments or insight. Hopefully the photo links will be functional:

Hey, Fellas,

I had mentioned back in 2012 when I joined the Forum that my late Grandfather had brought back a WWII P-38 from occupied Germany immediately following the war. I'm pasting in a quote from my New Member posting at that time:

I have a WWII P-38 (AC 41) which my grandfather brought back from Germany at the end of WWII. And no, it was not taken from a dead German officer (saw that on an earlier post ), but was acquired and/or purchased by Grandpa Joe while he was a member of the Scientific Observer mission sent over to benefit from German advances in technology. It came in a hard shell luger holster rather than a P-38 holster and has one matching magazine. He wasn't a gun guy and so gave it to my father, but to the end of his days swore it had been a luger...

Well, I dug out the old P08 holster and was looking at it, and was surprised to see that it seems to have been made in 1911 (B. Wiedermann, Berlin N.39), and has a number of additional markings on it that I am unable to recognize or identify. I'm hoping someone here will have some ideas or suggestions about deciphering some of these markings.

Aside from the "B. Wiedermann, Berlin N.39" and "1911" stamps on the inside flap (and my father's initials which are up and to the left in the photos), there are two ink stamps which I'm hoping might look familiar to any Luger collectors out there. One is an ink stamp to the right of the loading tool pouch, and appears to read "B.A.G. 1911" or possibly "1921". The second is a larger rectangular ink stamp, above the loading tool pouch, and which is hard to read. In the center it looks (to me) like xxxx "SV ss" xxxx. The left side and right side characters of this stamp are not very legible to me, so I just put a bunch of x's to represent them. I guess it's possible that I'm reading it upside down, also.

I'm hoping someone has seen something like this markings before, and/or can suggest where I should post them to seek help in identifying them. The holster looks black but with a brownish tinge which makes me think it was probably re-dyed at some point. The holster has some bulges where the front of the slide and front sight pushed on the leather, as well as an indentation on the holster flap where the spur hammer rode. It's still fairly supple, all things considered.

My grandfather was given the rank of Colonel or Lieutenant Colonel in the Scientific Observer mission, and picked the Walther up as a souvenir for my Dad. I inherited it when my father passed away. I still have my Grandad's uniform with Ike jacket, as well.