Caveat: I want to preface my remarks by emphasizing that I do not know the seller of this item...I have not seen anything but the photographs of this Artillery Luger and my opinion is based on the photographic evidence ...with that said... here is my opinion of what I see illustrated in several photographs that I have cropped and adjusted the contrast and on which I have corrected the color balance.
My opinion is based on reviewing literally hundreds (and perhaps thousands) of photographs of serial numbers on Lugers, especially artillery models... and also on my years of metal fabrication, manufacturing and gunsmith experiences.
The seller mentions in the auction that this rig was purchased by him from Simpson's and I have no way of knowing if this is true... and I have never heard any derogatory antecdotal information regarding this dealer. To the best of my knowledge, this dealer sells only righteous merchandise...
Photograph A - In this photograph I see file marks that are not typical of the finish normally seen on the stock attachment iron. The blue in the file scratches does not match the even finish of the blue where there are no scratches. (See the negative image of Photo A)
I also see the ghosts of previous numbers... They are not clear enough to completely make them out, but it is obvious to me that the original numbers were ground down somewhat and then stamped over. The number stamps that were used, while matching the number set used on the magazine bottom (Photo E) do not match the number font that is used on the pistol... Each of the number "3" on the pistol could be described as rounded in appearance but the numbers on the stock and the mag bottom are flat-topped. IMHO these numbers should match the font used on the pistol itself.
Negative of Photo A with details
Photographs B, C, D, & F ---As mentioned for Photograph A, All of the number "3" on the pistol could be described as rounded in appearance ...the numbers on the pistol appear to be genuine based on this observation... however the front of the grip frame is not clearly visible in any of the auction photographs ( Especially not in Photo F)... so the number on the front of the frame cannot be grouped into this opinion, and no comparison of the letter "g" on the stock can be compared to the grip frame for like qualities. The number "2" in all places on the pistol appears to be flat bottomed with an upward rising serif or tail... the number "2" on the stock is not of the same font.
Photo B
Photo C
Photo D
Photo E - It is my opinion that this magazine bottom was numbered by someone other than the original manufacturer...
Photo F
Well, that is it... IMHO this Luger does NOT match the magazine or the stock.
I won't venture an opinion on the market value of this rig... other than to say it is a nice looking Artillery Luger Pistol and I wouldn't mind having it... but the value in my opinion could not be based on the premise that this is an all matching set of equipment... I invite others to comment on the Luger rig in question and my opinions...