I'm not seeing any issues with the witness mark.
The scratches on the right side of the barrel that run parallel to the bore all seem like random scratches.
The circular rings around the base of the barrel could suggest slipage in a barrel vice. It's something I'd about have to see in the flesh, and even then it may remain uncertain. It looks to me like if it was rebarreled, it was done a very long time ago, possibly even war-time. Some photos of the left side show the barrel to be in better blue than the rest, while the close-up photos of the right side seem to show even finish throughout.
Bottom line is I dunno.
It's not a fake created for deception and profit, but what has happened along the way is uncertain.
dju
|