Your Luger is not 'undated' or perticular unusual. The bakelite grips are also quite common, but they can change hands for some insane prices these days. If you take some close up pictures, especially around the holes on the inside, it might be possible to say if they are original or not. ..or you can do a search in the forum on how to check it yourself.
You are however looking at one of the best Lugers made! And for me it looks like a honest good excample, a collector grade Luger. I would buy it