So I finally got it cleaned up to the point you can actually see the marks. She's kind of pretty all cleaned up, but so much of the bluing is gone and the outside of the barrel and loading lever were pitted enough that it will get ugly real quick if I don't oil the outside real good every time I clean it.
I hope you can make out the markings
The number 2550 appears to the right EIE Italy on the butt of the gun. Also the number 141 is stamped on the frame under the grip and on the underside of the barrel.