'03 rear sight question

[highpower3006]

I have a '03 serial number 1461633 barrel date 7-34 that I just purchased. I have a few 1903 rifles and none of them have a rear sight slide like the one that is on this rifle. There is a line on the slide that under close magnification appears to be filled with platinum or silver. There is no star on the muzzle or a star gauge number stamped on the barrel, so I am assuming that this is just one of the standard 1903 rifles produced in 1934.

It it some kind of NM sight? I only have three others so I don't have a large personal database to choose from. I was reading about them in Brophy's book but he just mentioned the early sights with the platinum line bisecting the peep sight. The picture was taken right after I got it and before I took the time to clean it up so I apologize for the dirt that is in the line.

Any information that I could get on it would be greatly appreciated.

Information

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[Rick the Librarian]

Never seen one exactly like that - I took the liberty of passing the picture along to Jouster, as well.

[Fred G.]

At its lowest possible setting, that rear sight notch with the leaf in the up position would put the shooter on a target at 1400 yards range. I believe that the line is just a scratch put into the bottom of the battle sight notch by somebody who wanted to create a fine groove to sight through on the Battle Sight.

[Rick the Librarian]

Seems to be the consensus.

[Promo]

Maybe something luminous, when shooting in the night in the "battle position"? Or to use it in the same position with a different contoured front sight.

[highpower3006]

It is most definitely not a scratch. It is very finely machined and the filler is almost certainly a metal like platinum as there is no tarnish on it. I don't believe it was done by the arsenal, but the quality of the machine work tells me it certainly wasn't done on someones kitchen table.

[Fred G.]

Well that IS interesting!

[Chuckindenver]

shooter mod..
the filled lines iv seen are on the iris of the sight

[emmagee1917]

Maybe a grenader added it to stand out against shadows in a town type setting.
Chris