NZ marked ROFM 1941 No4T

[smle addict]

If you are referring to the D6/E stamp, I believe it was applied sometime in 1943. I'm sure Roger can add much more than I can, but the 1943's are an interesting bunch. I have a a few 1943 T's, and they run the gamut from no "T", no D6/E, no S or S51 to having them all in the span of a years time. As others have said earlier, 1943 seems to be the year the markings were mostly standardized. I say "mostly" because I also have a 1941 maltby T, and the "T" and "TR" were both applied later on the butt socket.

Roy- that's a beauty of a rifle, by the way!