Tell tale signs of re-bluing.

I would like to ask for advice on identifying a weapon has been re-blued. I have recently aquired a Mauser manufactured P08 with matching numbers and suspect that it may have been re-blued based on the lack of wear on it (holster wear) It shows signs of some minor pitting but the lines are still crisp and the proof marks are all very legable. The current finish is quite deep but I'm wondering if it is too good. Any advice is greatly apreciated!

T