The highest prefix I've ever seen on a Savage rifle is 15C - never seen a 17C but it's not so far away, so is feasible. And certainly both Savage Mk1 & Mk1* No 4 (T) rifles were scoped up. There were about 6 in the batch I bought in the 1990's; both Mk1 & 1* rifles. There were five Mk1*'s IIRC & ALL bore scope serial numbers on the wrist of the butt, & all of those were lower range serial numbers consistent with Mk1 scopes. Additionally, the markings had clearly been there a long time & were not recent additions.
I agree that many of the Savage rifles (particularly 1* T's), seen on the surplus market are the 'less scope' variety, & this probably reflects their being sold off years ago into same US surplus market (being less 'useful' to the military than a complete scoped up equipment) - where they still regularly reappear for sale.