I picked up a Sabatti 450/400 Ejector at Cabela's-Buda this past Saturday. While talking with the folks at the Gun Library they mentioned that the newer guns that are properly regulated, i.e. no dremel work, have an X at the end of the serial #. Mine has an X.

I took it out for the first time today and managed to get my R/L spread down to about 3/4" vertical and horizontal at 25 yards after getting a hang of shooting it. I do need to color the front sight insert for better contrast and the comb is a bit high for me but to me it was money well spent.

Eric