If you're sure it's a 1950 it's not a Featherweight, the Fwt being intro'd in '52 and they didn't have a Schnabel fore -ends. The later Fwt intro'd in the early 80's pioneered the Schnabel fore-end on the Fwt.
If it were a Supergrade you would already know because it would be designated as such on the floorplate, as well as having a different checkering pattern than the standard rifle and an ebony fore-end tip.
In 1950 it could have either the low comb butt stock or the Monte Carlo buttstock.
To me, the Monte Carlo is worth more, better for scope use.
In 1950 it left the factory with a steel buttplate. If it's still there it ups the value compared to one that's been chopped and a pad added.
Condition is everything and pics speak volumes.