Looked the rifle over and cleaned the dust off it last night...pulled the front wood off(first time ever for me)...has the serial number stamped on the right barrel adjacent to the receiver serial...all nicely stove painted under the wood. Looks like RFI scrubbed a number off the left knox form like the left buttsocket was scrubbed. Does have the serial on the forearm up front. Trigger hangs off the trigger-guard
My guess is that the receiver and barrel are an original Britishassembly. I took some pics but have not attempted to post them yet.
I have not shot this rifle in a decade or better but it was superb with South African ball...this factor the main reason I put a milled No.5 Mk.I sight on it as the sheet metal ladder was sort-of floppy and the peep could not be relied on to hold elevation(couldn't find a milled No.4 sight at the time).
You guys are a wealth of info!...Thanx