another new, and my first luger

[Patrick Mc Mahon]

http://forum.lugerforum.com/lfupload/dsc02270.jpg
http://forum.lugerforum.com/lfupload/dsc02266.jpg
Here are a few of the photos I have finally loaded of my 1918/1920, possibly first an artillary luger, then a 4" barrelled luger, with s/42 marked (in small letters, "upside down" on the toggle, and on the barrel.
Is this mark, on the barrel, of an eagle with a capital letter "A"? It is not clear as the mark is incomplet on the barrel. Is this the KU mark?
the other photo is a few more repro toys of mine.
I will send the rear frame stampsing next
Patrick