Hi Don, and welcome to the forum.
Your 9mm Luger has been refinished and appears heavily buffed. if it functions properly, it's an ideal shooter.
DWM wrapped up and shipped all production to Mauser at Oberndorf in 1930. I can't make out detail in your photos, so can't help that much without the serial and suffix. In any case, if it were a WW-I military gun it would have the date on the receiver's chamber.
It looks like someone engraver scribed serial number digits on the receiver after it was refinished and buffed. The proof acceptance marks on the receiver look like those applied at the DWM factory.
We publish an FAQ on this site that you'll find helpful:
http://forum.lugerforum.com/showthread.php?t=13121
Your DWM Alphabet Commercial Luger in .30 Luger is in it's original finish, so you have an idea how these guns look when they left the factory. The "i" block was the first block with letter suffix, following roughly serial number 92000. It was made in the early 1920's.
The magazine in your 9mm Luger is a fxo milled magazine made by Haenel Schmeisser in Suhl. It's the best magazine available for shooting LUgers, and dates from late WW-II.
The holster looks like a stretched out post war P,38 police holster or an East German police holster from after the war.
Please try taking some sharp pictures of the detailed markings in shaded natural light.
Marc