I used to have the address of a database that could trace the manufacturing of German Mausers to where the steel action/barrel was forged (or hammered, this part of the process was mostly based in Austria) to where it was fully assembled (mine was completed in Lubeck, Germany where a wood fashioning company was based. Btw, mine is a 1939 K-98 code 237 made by Mauserwerke). But I lost it.
So go to the website lionk I provided below (be sure to introduce yourself in the newbie section).
And PLEASE remember: PHOTOS!!! We need to see PHOTOS. Make sure the lighting is good, get the serial number, Manufacturer markings, date the steel was laid, and the firearm as a whole (use masuring tape to give us an idea of the dimensions, be sure to photograph both sides). Either Admin or Marswolf or somebody there will be able to pull up the Mauserwerke engine.
http://www.hk94.com/hk/index.php?&
Congrats on your anniversary, your rifle, and I'll turn your face into a crater if I even suspect that you're being a jackass by doing something unsafe (like forgetting to unload a bolt action before trying to clean it).
Other than that, be safe, and have fun.