Sorry, I should have said that the small mark below the E on the knoxform is indeed a Germannitro-proof mark, applied when the rifle was imported. It is the hollow/doubled F in a circle that must be a clue. And the P, of course. According to Skennerton
, the P signifies a replacement barrel.
Resisting the urge to pull up the plant to see how the roots are growing, I do not wish to dismantle the rifle before a firing test, and thus disturb a setup that may be just right, merely from impatience to satisfy my curiosity about its history.
P.S: Frederick303, would the FF stand for Fianna Fail?
---------- Post added at 05:21 AM ---------- Previous post was at 05:13 AM ----------
Thanks again! That was the key info. The FF is identical to the one shown here:
https://www.milsurps.com/showthread....ht=Fianna+Fail
And I have observed that the front trigger guard screw is not original. So any arsenal setup has already been disturbed. So I AM going to pull up this plant to examine its roots (or rather, barrel markings).