Here is the OP again.

It does say "United States Property" on the bottom of the barrel. I should have included that in my first post.

The stamps beside the letters NP on the right side of the barrel look like the crowns in the photo shown by Jackflash above.

Wiregrassguy, I am not sure what you mean by the head of the ejector rod. Is it the ckeckered steel knob on the ejector, or the little shaft that slides in a sleeve under the barrel? That little shaft is white on my gun.