Picked Up Late-War Sauer 38h

I was up in Palm Beach County attended a Tax Deed auction and decided to pick up the Sauer 38h I had put money down on a few weeks back. The pistol has been fired very recently and not cleaned. It does not show any effects of corrosive ammo use and I suspect the only shots fired from it post proofing were the ones that fouled the bore. I suspect the shop I bought this from funtion fired it. The pistol looks a little better than I recall. Although very thin the blue appears intact. I observe very little field use in this pistol. The serial number, 500292 appears on the left frame. The serial number 291 appears in the bottom of the slide under the muzzle ring. The serial number 291 also appears on the breech block rear.Is that a factory mistake made in haste at the end of the war? I reckon so. There are nitro proof marks on the slide, frame and barrel. There is a police eagle/F marking on the left trigger web. The left grip panel has a hairline crack. The magazine is the unmarked "thumbnail" type. There are no other markings on this pistol as to caliber or maker, as well there is no safety lever. The trigger appears to be some form of pot metal that I have observed on other Sauer pistols. It is dull gray in color with a small inset in the rear of the trigger blade. I expect that a brief history of this pistol would be that it was produced at Sauer, sent to the Police inspection facility were it was inspected and perhaps sat until capture? The police marking appears to be blued but I do see some glint of fresh steel if I turn the pistol in the light so it appears the marking was applied after bluing. Thanks for any input on this piece. I paid $350 and WAS able to convince them to accept my C&R on this item.

This Sauer 38h came with a brown leather German holster from WWI. The pistol fit the holster well and appears to have been together for a long time. The strap is attached to the flap and there is a metal rivet on the left side of the holster body at the end of the stiching. I am interested in a marking on this holster. From what I can see the holster appears to be a brown leather WWI holster that ended up being used to house a Sauer 38h very late in the war. There are two sets of markings on the holster. First is the deep stamped manufacturer marking:

SATTL.-LIEF.-VERB.
SITZ DRESDEN
1918.

Slightly above this in a box that is not stamped deeply at all is:

L.Z. St.
H. Dr.


My questions are about the second, lightly struck stamping. What is the meaning and era of the second stamping. The Sauer has been in this holster a long time. It does not appear to have been modified for the pistol in any way and does not have any other National Socialist era markings in it.