The crowned letter is almost certainly an acceptance stamp. In the Imperial era, a small crowned letter was applied to almost every part, even the smallest pieces, even springs and small screws. If this is the case here, then it probably isn't unit marked, flipping the disc could lead to a unit marking but highly unlikely and generally if the acceptance is showing on an otherwise blank disc, most do not risk a flip as it is always a possibility to damage the surrounding wood.
It is a exceptional rifle, very tough to find this original, I wouldn't do anything to it, - including flipping the disc. At this point any effort to improve the rifle will be counterproductive, certainly harmful to value.
It is a exceptional rifle, very tough to find this original, I wouldn't do anything to it, - including flipping the disc. At this point any effort to improve the rifle will be counterproductive, certainly harmful to value.
