1916 DWM Luger - Help Needed

[LugerNewby]

Hi gang -

I am new to this forum, and new to the Lugers. i have a DWM commercial Luger from 1920 and now I am looking to get a second, this time military. I have the below specimen at my LGS on hold. Selling for $1,699 - I might be able to work it down by $100-150 as I am a regular there, and they know me...

Here is what I could use some help with:
1) Confirming it is original finish - I see the hallo on the serial number under the barrel, but want to make sure the experts here agree
2) I can see all small parts match from the outside - fair to assume rest match, or ask for the grips (at least) to be taken out - i know if I were to take the right one off, I should be able to see both grips numbers.
3) Anything unusual about the markings, anything that may be missing or indicate a potential issue with it? I did not take a pic of the top strap but the 1916 stamp there looked legit (in line with rest)
4) The bore seems to have some flakes in it? Could someone comment on the bore - a potential concern / in line with expected / better? The only real reference I have is the commercial Luger I have and the bore is a little cleaner / shinier
5) The magazine # does not match. The rest you can see. Condition wise, is this a VG (for a Luger), or below? Pricewise, is it priced fairly, low, high? I am looking for a fair deal, not to steal it...

Thank you all in advance!
Slav