I have seen this seller auction other holsters that have a moldy appearance. Funny that the mold is primarily on the inside?

like it had been filled with water...
IMHO This holster doesn't look genuine to me. The belt loops look to new to be on a holster in this condition and the stitching doesn't look original either. It is as if the holster was weathered by leaving it top side up and the belt loops were not exposed to the elements, so they are still in pretty new condition.
the back of the holster is marked P38 and not P08, yet the mag pocket has cutouts for the Luger mag bottom knobs. Possibly a reproduction that was mismarked by the maker...
"lugerholsterrepair" may be able to provide more credible comments on the holster's construction.
At least one forum member has previously opined that this person sells new reproduction holsters that have been intentionally "weathered" by leaving them outside and exposed to the weather.
My advice is to pass, or be prepared to wave goodbye to your money!
-Just my $0.02