Grips are part of the pistol, methinks

[Frank]

Michael, I agree with Tom A. I also think you should try to find a set of E/655 Armorers Grips as Ed suggested. They will cost a bit, but would put your Luger in a lot better light. Not as good as matching grips, but a bunch better than you have.

Of course, some Military Mausers didn't have numbered grips, unfortunately the 1940 Lugers did.