Hi Emo,
E. Bender, in his large book on luger holsters on page 200, shows an almost identical holster as yours...that one is in mint condition and was at the time the book came out in Mike Morris' collection.
Does yours have any stampings on the back ? The Bender holster is indicated to have an Imperial "Crown/III" on its back.
Here is the Bender book page 200 photo scan :