Updated 9-28-2016 , barrel replaced, see post #9 below for pictures.
Thanks to a heads up from Keok

i, I was able to snag this original(but rebarreled) 1914 DWM L P 08!
A quick re-cap on Artillery luger production by mfg and date:
Quantities are approximate - so please take them as a guide- not gospel.
DWM:
1914 - 1,000
1915 - 15,000
1916 - 20,000
1917 - 100,000
1918 - 25,000
Erfurt:
1914 - 25,000
So as you can see, the 1914 DWM is by far the scarcest.
A complete mismatched DWM 1914 can go for $5k, a matching one $10K or more, depending on condition.
This speciment is numbered 1008, metal parts are largely original to the 1914 luger, with the side plate an un-numbered replacement. A P 08 type rear sight was dovetailed into the original rear artillery toggle to provide a rear sight. The barrel was replaced with a 4" 7,65mm unit.
The work would have been done in Suhl, as evidenced by the E/N and E/J proofing on the M. Moeller barrel. The barrel is also relined to 7,65mm. These proof markings came into use in 1939 with the Proof law of that year. They would not have been used after the fall of the Reich in 1945.
7,65mm lugers were used by various non-military units of the 3rd Reich, such as the railroad, post office, customs, forestry, etc. They could have been sold to privileged individuals also.
Purposes of this post are to document the as received condition of this pistol and to provide a base line for comparison after restoration to its original artillery configuration.
Enjoy the pictures and now I'm on to the "restoration" project.