Really awful photos at:
1941 Long Branch pictures by spinecracker - Photobucket
The back of the bolt handle looks shiny. The machining marks on either side of the shiney area look identical and have the same orientation as the machining marks in the shiney area. The serial number runs from shiney area to the unshiney area, and the font of the "2"s (one in shiney area, one in non-shiney area) is identical and the same size. It looks more like wear to me, but I am not an expert. If the bolt is a replacement, would they have replaced it with parts correct for a 1941 Long Branch (i.e. early style cocking piece). When did Long Branch stop making the bolts with the holes in the end of the bolt handles?
Edit - I just thought about this - I only became an official Enfield collector yesterday now that I have 3 of them - woohoo!!!