Throckmorton of N.C. Pitcher with Musical Notes 1940s?

I bought this stout pitcher a week or so ago at a thrift shop. It is about 8" high and wide and sturdy looking, although really quite elegant. It is signed "Throckmorton of N.C." and has musical notes sprinkled around it. The glaze is very unusual, with bits of blue in the white parts. If you look at the first two pictures I posted you can see what I mean. In the first one the white glaze has blue in it and in the second, showing the other side, it is whiter. You can't tell from the photo of the bottom how smooth the bottom is.
I saw one mug with musical notes sold on eBay a few years ago but otherwise haven't seen anything like it.
The notes are brown. Presumably it was thrown by Thomas Throckmorton in the late 1930s or early 1940s. Throckmorton operated in Buncombe County, N.C. in the 1930s and 1940s.Throckmorton and his wife bought the Omar Khayyam Pottery in Luther (or Candler), N.C. after the death of Oscar Bachelder. They operated the pottery for several years before local anti-German sentiment forced them to leave North Carolina.

As always, I'd love to learn more about the piece if anyone has any information.