Alley was my first thought, but not as familiar with these swirls. Foreign was my second thought. I pictured Ravenswood as having orange ribbons diving deeper and a lighter blue. But I don't know what would make it "premium" *shrug*
Wow, nice marble. I had one similar as a kid with a bit more white and black streaks. Only other time I saw one similar was quite a few years ago in a collection with a bunch of other smaller Masters.