Likely an early BSA before the M47 coding was adopted.I recent got a Leen Enfield No4 Mk1 with a serial number starting with "W" followed by 4 digits 63XX. Also the manufactures mark is the letter "B" but it does not look right to be Long Branch.
Any help would be appreshiated.
Thank you
Likely an early BSA before the M47 coding was adopted.