DWM Commercial with military markings

[pursihei]

Hi,
I acquired a Luger pistol about two weeks ago. This is my first Luger and it was sold as DWM m23 commercial but I have found difficult to identify this gun from the Luger literature.

It seems to ne rebarrelled to 7,65mm and has now 3 7/8" barrel. It also has military type markings. All parts are matching except that takedown lever has no number. SN is 913f

There are 4 lazy C/Ns proofs in barrel, receiver, frame and breechlock.
right side of the frame is without any markings. See photos





Right side of the receiver is without markings and the chamber is unmarked. Also no markings near the backsight. There is a small Prussian eagle in the left side of the breechlock. See photos





There is small proof mark in the receiver which looks like a wing or chicken:


Being new in this field I would guess that it is an early DWM/Krieghoff rework of 1915 imperial? Is this correct? Thank you for your help