Question for those a lot more knowledgeable than I am... What Winchesters have a front sight dovetail that is .470?
Asking because I have a vintage Lyman No 5 folding sight for Winchesters with that size mount. It folds as it should, the ivory bead is intact and the screws are not frozen. The writing on the hood says "LYMAN REG US PAT OFF".

Per Nick Stroebels ‘Old Gunsights’ book,”all Winchester dovetail mount front sights use a 0.375 (3/8) inch female dovetail.”

Is that an ‘I’ marked on the underside of the sight base?

Memory says some stevens rifles had wider dovtails, they are not easy to find

If there is an "I", I can't find it under magnification... I wonder if what I have is for a Marlin or Remington?

What started this whole ordeal is my 2nd G-Grandfather's rifle. It is an 1894 with the 26" half-octagon / half-round barrel in 38-55, made in 1901. The rifle letters as having the Lyman sights. Sometime in the past, the folding sight and rear peep were removed. The front was replaced with a Sheard's Gold Hunting/Target sight and the peep removed. I have the correct Lyman folding sight replaced on the front and the one I have now is left over from that effort. I have an excellent condition "D" marked Lyman No 1A for the peep but that is not correct for the rifle. Unfortunately, the 1A is from 1905...

So... long story short, my search continues for a Lyman No 1 "D" marked peep and I am going to sell the 1A, the No 5 folding and the Shear's.
Before I sell the folding sight though, I want to get the right information...

Per Stroebel, “some Stevens firearms used a 0.4375 (7/16) inch wide front-sight dovetail.”

Guess I was seeing things, looked like there was an I stamped about 1/3 of the way up and a little to the right in your last pic. That would indicate a Stevens Ideal application.

May want to post this in the Savage Collectors Forum.

Definitely a sight intended for a Stevens single shot.

On the contrary, I think you have a damn sharp eye! I'd have to have it in my hands to tell, but I see exactly what you are talking about.

Using a magnifier and light, the markings on the right side in the picture are just scratches and flaws in the finish.
On the left side, right about the middle, the dark spot is what appears to be a punch mark

Out of curiosity, I sent it to Lee Shaver for his opinion... he didn't even hesitate to say it was Remington or Stevens/Savage and most likely Remington