If all matching and blued, then yes, a 1939 is worth a lot more than $500. $500 is about what a "shooter" gun is worth.
Welcome to the forum, and I'm afraid I have no idea what the hell THR stands for
It is usually better to post the pictures on this forum, in that way, as long as the post is here, the pictures are too, but they are good photos!
I must be close to you, I live down south of Denver....
Ed