Markings on 1943 Lithgow SMLE

[Stumblebum]

Well fellas, you've given me some things to check on the rifle in more detail, and some thoughts to mull over, that's for sure. Here's a peak at the appropriate point inside the stock if it helps with further discussion: Attachment 44790

The one time I've disassembled the rifle so far, it took some gentle persuasion with a wooden dowel and hammer on alternate sides of the stock at the back of the receiver in order to get them apart.