early german luger, looking for info

[speedydemon72]

I have a German Luger that has been passed down in my family since my great great grandfather. It is a 9mm, 6" barrel, reverse safety and also has the grip safety. 100 & 200 range site. You can put a stock on this gun(don't have one though). It is missing the front site piece. It is stamped(scrolled) DWM, the serial # is 3608. All numbers are matching with the exception of the clip(#'ed 3331). Underside of the barrel has a crown symbol and the letter "M"(i was told is a navy issue??), with ser. 3608 under that. 08 is stamped in 3 visible places on the gun. There are no other markings, #'s, or stamps on this gun. I took this to a gun appraiser(not a luger appraiser), he couldn't give me any info on the value of this gun. All he could tell me is he thinks the year is 1904 and the bluing is about 95% and it's in excellent condition. What I would like to know is an estimated value of this gun....the year and model....and any other info would be greatly appreciated. Thanks so much for taking the time to read this.