Richie, this gun is becoming very interesting to me! The marking on the front grip strap is the subject of much conjecture. Please see this thread (
http://forum.lugerforum.com/showthread.php?t=26006) for the current state of debate on this. While your marking is not exactly the same as the one at the top of the thread, if you will click on the link to my website (referenced in the thread) you will see how your marking is related.
I am extremely interested in seeing photos of the grip strap marking as well as the matching holster. If you cannot post them, email them to me at the address below and I will post them.
Also, please let me know if there is a small, script letter below the serial number stamped on the front of the frame above the trigger guard. A photo of this would be helpful.