[Blockhead]

I'm considering buying the following Luger that appears to have all matching parts including the magazine. However, a friend of mine who collects German militaria pointed out to me that the finish should be consistent on all the parts, but to him it looks two-toned. From the pictures I have I think he is referencing the toggle compared to the receiver/frame. Is it possible for a Luger to look that way and still have an original finish? Any other thoughts on this pistol?