According to Robert Adair's Unique Pistols book, your pistol is indeed the Rr, with serial ranges of 102000-114,000 and in the 115,000-400,000 ranges for a total of 13,00 pistols. Made from 1945-1951 so yours is probably later 1940's. The Palm tree stamp is the Moroccan property stamp so that is where it was at one time then exported as surplus to the US before 1968.I may have the wrong pew on this, but I have a Kriegsmodell that may actually be a Modele Rr 1951. i saw a thread on this Lugerforums dealing with serial number data gathering on the Kreigsmodells, but now can't find it. My gun's serial number is 109785, no Wassen proof, exterior case-hardened hammer, backstrap bump, palm tree, and engraved name on the frame.
If this is the wrong thread for serial number gathering, please forward to the correct thread. This gun shoots well and I would like to know when it may have been manufactured. I assume it was made after WWII. Photo attached. View attachment 648955