I would point out the Englandstamp can be missing from a pre 1968 Enfield Rifle
. The law required the rifles to be identified, it did nto require them to be marked. The England stamp was added to meet the impor requirement, but was not always present on a rifle for the following reasons:
1 ) Imported from a country other than the UK. I have been lead to believe that century imported a quantity of No 1 MK II rifles from either Belgiumor Portugal that had no such England stamp. I have read a few different stories on that, but it is apparent that Portugal got rid of their No 1 MK III rifles from WWI post 1963 and that they ended up in Century arms hands. Apparently never sent out with any such ID.
2) The Irish lot that came in direct from Ireland in 1961 had no such stamp. To meet the requirements of to identify the country of origin each rifle was shipped with a slip certifying it was from Ireland.