Savage rifles were never marked "TR" unless done by an enterprising Armourer, (or uninformed faker), after the fact. It was a marking used on BSA rifles to separate them for conversion to sniper at H&H. Guessing the rifle is a "Less Telescope" rifle that someone completed with a scope and bracket. I have both Savage Mk.1 and Mk.1* rifles marked S51 on the butts as converted at H&H and neither was ever completed with the addition of the telescope and bracket. Hence, no finish "T" stamped on the left side of the body.