I got the same one. It's a Navy arms Griswold. If you look at the back of the cylinder with a magnifying glass, you should be able to see the F.L.II. Pietta diamond with the initials in it. the proof marks for mine was on the front of the cylinder, and the serial # on the side of it. At $125, you did not do bad at all. You actually got it pretty cheap! Great gun, I truly do love mine, it has been my primary shooter of Late.
"I'm your huckleberry, it's just my game"