Mid-century vintage aqua blue art glass bowl, Blenko or Viking?

1950's - 60's vintage art glass bowl, not sure which of the West Virginia makers this one is? The color looks closer to Blenko to us, though the shape is more what we tend to think of as Viking! Maybe Rainbow, or Pilgrim, or Morgantown? I've just had all the books we have on modern glass out, and can't find this particular piece listed anywhere, so if you know this piece, please email us, we've love to hear from you! (Thanks!)

Item No. h1073