Actually, I researched the serial # 55420X, and it turns out the gun was built in '50, not '49. It looks just like yours, Calhoun. Same stocks and checkering. Same receiver sight and swivel eyes, and very clean like yours. Although the sight needs a good cleaning.The only thing different is that yours looks like it's stamped on top of the receiver and mine is on the left side. If I understand JoeMartin correctly, than mine was factory drilled and tapped. Probably won't put hands on it for another week and half or so. The only pictures I have till then are from the auction.

www.gunbroker.com/item/788590902


My heart's in the mountains, my heart is not here.
My heart's in the mountains, chasing the deer.