Back when Sears was using the J. C. Higgins name before they changed to Ted Williams not many brands of scopes were being offered. I'd pretty much bet it was one of the old Weavers. I guess Redfield and Leupold were around back then too but about all we saw in those days were Weaver and Redfield scopes plus an occasional European one.
Not sure when the JC Higgins name was dropped but by the early to mid 60s I'm pretty sure.