Bernard, your amber vase must be very similar to the one I pictured? This is 'Amber Sunshine' (the amber glass Webb named that also glows under UV) from the 'Gay Glass' range, and also 4" tall.
Looking at the clear optic-ribbed bowls again, this does have a pattern similar to WF 'diamond-optic', as mentioned previously, and I'm sure these are not the same style as Webb's 'wave-ribbed'. I'll try and post a photo later, but current [quick] attempts with flash are rather poor (always a problem with clear glass, I find).
According to Art, Feat & Mystery by H.W.Woodward the Gay Glass range had three different finishes; Plain, Venetian Ripple, and Old English Bull's Eye. Well, I have loads of Bull's Eye and can only assume that Venetian Ripple is either the 'wave-ribbed' or 'diamond-optic' effects I describe.
[I won't ask what makes a Venetian Ripple... :wink:]
Perhaps I should have qualified my statement with "Given the information to hand, Webb always gives a square appearance...", which was the purpose of the post until further infomation proves the opposite.
Thanks for the update on the WF vase Emmi. I think this is Pat. 9353, 1954 catalogue.