Buy one, and enjoy. WTP variations are available on the C&R market from time to time. Get a nice collector grade one would take some waiting time though.
I got one holster. It came with the pistol. On its cover, there are two lines of text. The first line looks being a German officer's rank and name... A colonel? a sergeant? Or a general officer? No idea.
The 2nd line... Looks being a unit ... I have no idea on these writings... If you could tell. Here are the pictures of the holster:
The markings literally translated approximate:
High Secretary, Wood(en), Military District, 10% Special Rail Road Service Command