Rather odd for the marks to be so heavily xxxed-out. Lined through seems to have been a typical and sufficient procedure, thus enabling the origins of the parts to be traced if necessary.
And, if I recall correctly,
Peter Laidler
has written somewhere that the
receiver was the fundamental item of the rifle's identity and was therefore
never replaced - i.e. a new bolt should have been marked to match the receiver, not barrel and receiver marked to match the bolt, which was a replaceable part.
Peter, are you out there? Is this OK or a bit "iffy"?