moonstone opalescent hobnail glass bowl, vintage Anchor Hocking or Fenton?

Moonstone opalescent glass bowl in a hobnail pattern... Anchor Hocking? Fenton? I think it's Anchor Hocking, but I've been told the moonstone hobnail glass is a older Fenton pattern. It's very pretty, roughly mid-century vintage. This bowl is about 9 1/4" in diameter across the ruffled rim, and in very nice condition without chips or noticeable scratching.