This one has just come into my possession. It seems to have a textured paint finish, although it is difficult to differentiate between that and rust. TTC 1942 Mk.2 Liner and Mk.3(?) Chinstrap. The textured finish obscures the Shell manufacturer markings. I am also confused about the frontal Rank Chevrons with what looks like the letter 'N' above.
As ever, any comments are gladly received!