Thanks for the replies, guys!
I realized right off that this was not a William Moore gun, as everything that I had seen of his always had either "Wm." or "W." stamped in front of the Moore. Like I said in the first post, I was expecting it to be a Belgian knock-off. It was the Birmingham proof marks that have me bum-fuzzled.

A flash in the pan, a cloud of smoke, and a prayer to the great Lord on high...