Hi Tony,
According to Leslie Jackson, Webb designed an optic wave-ribbed pattern before WF, and that WF probably plagiarised the design! That pattern, however, isn't the pattern on your vase. The earlier pattern, Webb's 'Cascade', and the WF wave-ribbed design are both different from yours in that they comprises swags (like draped material caught at the top at regular points), whereas the design on your vase is of even waves. I've heard a little about the pattern on your vase, but it's all hearsay so you'll have to wait for someone who knows more!