After some info on a 'scope - NO32 MK3

[jmoore]

Wow! Only three digits from the one missing off my Canadian No.4 Mk.I* (T)! (S/N 270)

Photos 23 through 30 of the MKL photo tour linked by Lance above ought to answer most of your questions regarding the scope markings, but as to why your "C" was green colored, that's a small mystery.

Yah, it's worth something, BTW. It just depends on how badly the buyer wants it. Is the mounting bracket still attached?