Thanks all.
Larry, yes the button is checkered, but as pcke2000 said, it's for the cleaning rod.
Jon, thanks for the date.
pcke, I, too, noticed the lack of rail slots when I bought her. I'd love to get a 1940, but I'm just glad I got this one for what I did.
Bubbaz, Thanks. I'm pleased with the clarity, but the orientation of some from what the original was have a tendency to bug me.
Anyone know of a source for the gas tube. Mine is pitted, but looks serviceable. All the same, I'd like to either replace it or have a spare.
I'm working on a trade with a good friend to get his Finnish capture. He says it's a 1941, but he didn't provide a picture of the receiver top. Just of the serial which I'll post in another thread.
Again, thanks all.