Ron,
I have a holster with a similar (although different) crown with a Roman Numeral III underneath. This is the only stamp on the back. On the inside of the flap is stamped the makers name; Lieferungsgenossenschaft der Sattler, Nurnberg, 1918. Whew! I'm outa breath after typing that one!
http://boards.rennlist.com/upload/crown.jpg