That is a rifle with lots of character, think of the tales that it could tell!
I don't think that the rear sight is original.
The rear sight itself isn’t I need to find a Lyman 6W. But the Lyman 48W is period correct. They did come from the factory with the 48W on them. When they had the 48W on them they had the Lyman 6W on them.
If your stock is factory inlet for the Lyman 48W (looks like it may be) the factory supplied a flat Lyman 12S slot blank in the rear dovetail.
That full buckhorn is a valuable sight.
From what I read the model 54 did not come like that. They came with two types of rear sights if the rifle didn’t come with the Lyman 48W then it had a Lyman 66W rear sight. If the rifle came with the Lyman 48W then it had the Lyman 6W rear sight. The Lyman 12S slot was something Started possibly on the model 54 NRA standard rifles then continued on with the pre64 model 70. Tell me more about this buckhorn sight?
You’re most likely correct about that. I was speaking based on a sample of one, a Hornet, S/N in the 44,000 range with a NRA stock that is factory inlet for the 48W that wears a factory supplied flat Lyman 12S.
