Yesterday I finally picked up my Luger pistol (my first, BTW). It is a Mauser, dated 1940. The most pertinent markings are:
*1940 date on chamber, 42 on toggle.
*Last two digits match on all parts I have found, inside and out.
*Right side of chamber has two markings, each winged symbols over 655.
*Next to those is a Nazi eagle over swastika.
*Barrel has a smaller eagle over swatstika on the right side, serial number on bottom, and 8,81 under that.
*Breech block also has a tiny eagle over swastika on the left side.
*Wood grips have only the wings over 655 symbol and a W on each backside, and on the left side also an M. There are a couple other letters which are too faint.
Anyway, I doubt any of these markings are particularly unique, but hopefully somebody can ID the markings and their meanings (outside of what the information on this site already gives out).
I also shot 50 rounds of Winchester 124gr FMJ today, with no functioning problems at all. However, I do not plan on shooting it much at all from this point on as it was extremely hard for me to manage the rather funky trigger pull. The gun appears quite intrinsically accurate, but offhand it is a difficult weapon for me to shoot straight.
http://www.nwlink.com/~dkamm/lugerl.jpg