John,
Your Holster is definitely legit. It's a 1944 made hard shell by Hans Deuter, maker code, "bmo". They made hardshell holsters in 1944 and used the RB number "0/0836/0029," and also used "WaA383."
It does have some issues with stitching though, and the left belt loop may have been replaced, but the holster is 100% original.
Matt
