cnv,
Nice looking piece. Now read about disassembly here:
http://www.wonderhowto.com/search/luger/
BUT! Be especially careful with the left grip. It goes up and under a metal lip for about an eighth of an inch and is very easy to break off the corner by the safety lever. I barely raise it by pushing from the inside then rotate the bottom forward.
Clean/oil as you would any gun using quality products. No oil on the wood!
FN