Did they produce pre-64 super grades in 338?

I'd agree with the $900 to $1100 whether a New Haven or FN post 64.

If it is a pre-64, I imagine it is extremely rare. I think that the end of super grade production and the beginning of the .338 win mag were pretty close together. I've never heard of a pre-64 .338 that wasn't an Alaskan but I'm far from an expert on the subject.