I own a Lee Enfield Mk 4 No 2 Being as this is the obvious place to get information. Here goes! The only "obvious" difference to the Mk 4 No.1 I can see, is the Brass but plate. Anything else? Would I be correct in thinking that from the viewpoint of accuracy the two models are identical? Does anyone know where I might be able to track the rifle's factory of origin, based on its serial number? So far I have come up a blank.