Can I weigh in and say that my opinion is that most of the the "less telescope" Savages were converted later. All of the ones I've seen including OC160 which I still have sport the big S 51 stamp on the underside of the buttstock. My 1941 BSA/H&H No.4Mk.1T doesn't have it. I don't think it was even used until the markings became somewhat standardized in 1943. The only markings present are the correct Enfield examiner's marks. I've yet to see a BSA/H&H 1942 dated No.4T. Has anyone else ever observed one?