Something Id like to understand. Rifle has been FTR in 53 and the barrel doesnt have same serial number but has 41 stamp on. I have another rifle FTR, my Mk1/2 in 53 and barrell has the appropriate P53 dated on. What does that mean ?
It probably just means that it's been rebarreled with a take-off barrel while in civilian hands. I doubt very much that it came out of FTR with a mismatched barrel.