RFI No. 4 T rifle?

Thanks all for information so far. I hope the additional pictures can provide more clues.

It was originally a BSA Shirley rifle (no great surprises about that I suppose, as most were). The rear sight may well have been swapped at some point, but if it is original, it would point to a BSA 43 rifle; one of the ones fitted with a replacement Mk1 rear sight at H&H, as some rifles arrived equipped with battle sights. IIRC MkVII unearthed some documentation that confirmed that a quantity of Savage made Mk1 sights were supplied as replacements, & these are seen periodically, usually, in my experience, on 43 dated rifles. (But on the other hand it could just be there by chance, due to passing through ordnance a few times!).

Thanks Roger that's very useful information. I am now trying to figure out how to focus the scope as the graticle is slightly out of focus for my eye.

It's been through the bead blaster locally I'd say looking at the edge of the backsight and blued . Telescopes are not focussed for an individual but for PV (that's perfect vision) on an optical screen. If that's the case here maybe you need specs.

I do have specs I am long sighted so distance is no problem. I don't have an issue with out of focus reticles when I use my Scoped K98, Mosin Nagant and Springfield rifles. I came across your old threads describing how to adjust the focus on the graticle on a No 32 scope, which looked quite daunting, but possible?

For what its worth, the Savage Mark 1 micrometer rear sights and the L flip rear sight were made by Lyman Gun Sight Company. Pictures of these sights are shown in WWII Lyman advertising.