46indian,
I believe 384619 is a Lend Lease. The stock and trigger housing, maybe the entire trigger group, are replacements and the front sight seal is missing so it is not completely original unfortunately.
This serial number fits in the LL range and the condition of the metal seems to indicate little use which is typical of many LL rifles.
I do not think the location of the
British
proof marks has anything to do with Sam Cummings or LL identification. The location of the proofs so far back on the barrel and the neatly spaced and aligned application of them are rather uncommon.
Is the letter code in the left angle of the scepters an F, L or a K or something else?
<< The symbol is K X B (with a 7 below the scepter)
Is there an 8 on the underside of the follower ? If so, is it on the end or in the middle?
<< There is an 8 in the middle (see pic)
Is the heat lot on the receiver's right front leg B 6 ?
<< The heat lot is B 6 (see pic)
Is the barrel date 10-41 or 11-41? I can't quite make it out .
<< The barrel info is S-A-10-41 (hopefully the new pic is better)