How-Do
The 5 is an S. What it reads is S No4 Mk I* (the o in No is stamped with a line under it, thats why after all these years it looks like a 2). The S stands for Savage. Part of the lend lease program, made in the USA by Savage. No4 Mk I rifle. The asterisk identifies the type of bolt release.
The BNP w/crown, based on where it is stamped is a Issuance and Ownership marking.
What a great mod. There a buttugly rifle originaly, but great shooters.
I have two No4 MkI*s, both Long Branch. A blast to shoot and easy to load for. no pun intended
Thanks for posting the images.