1914 Artillery Luger Missing Rear Sight?

[ltstanfo]

Hello,

I am new to this forum and this is my first post.

One of the local gun shops here in town has a very good condition 1914 marked artillery Luger (I believe, it is an 8" barrel) that has no rear sight. The rear sight base has been filled in with a piece of machined metal (in the white) and the manufacturer's mark has been (mostly) removed from the toggle (there are faint lines that I think may correspond to the Erfurt crown). All parts match except for the magazine.

The shop owner thinks that this may be an "Armistice Luger" (I have never heard of such). Any ideas anyone? I am interested in purchasing this for my collection but am hesitant. If this is real, any ideas as to pricing? He seems to think it may be in the $2500 range.

Oh yeah, the bluing is good / very good, I would estimate NRA 80-85 percent.

Thank you,
Ltstanfo