The Red Letter 37's...that's what I was thinking of! If it were that gold lode fill I could understand it. One sees lots of guns with that stuff in it. I can't imagine this is factory but I'd hate to remove it and find out later I shouldn't have. Red is such an odd color to fill in markings. It doesn't bother me. The next guy can take it off.
This Supergrade shouldn't be one but I wouldn't rule out the possibility of a late gun parts cleanup. Jack O'connor wrote that he got the last ever 7x57 they made by asking if they could build one and they had one barrel left. He of course had the barrel turned down and the rifle restocked.
Thanks,
Roger
