[I am thinking this is a Winchester Model 70 possibly made in the 1950's.]
Sears/Roebuck marketed that gun, and the fancier Ted Williams version, right into the late 60's,
IIRC.
Sears guns are valued on their shootability, not collectability - as there is none.
Scope mounts are the same as the M-70, and I believe the trigger was the same adjustable M-70 trigger. Any aftermarket stock for the standard action M-70 should fit, if you elect to go that way.