Help: Unknown Map Case

[Fabe]

FINAL UPDATE:

ok, after some detective work for a week, finally I found out what this is:

Hungarian policeman document holder - 1940's maybe 50's - but probably 40's...

I found the same style case - made with soft black leather - mine is hardened leather:

Here is a couple of pics - this one is 1960's made:

cheers, Fabe