well it's arrived - it's stunning

pics as below - shall do some more
5" tall, internal ribs to the stem, hand pulled and shaped rim in a deliberate shape, so this is not 5 pulls that all look the same, it is shaped like an iris I think. It is 4" + wide at the rim and the foot is 3" in diameter.
I have also found a Walsh Walsh epergne (see link below) that appears to have (not good photos) this colour iridescence but only at the rims of the flutes, the body of the flutes are clear - apparently that is referenced as Charles Hajdamach British Glass 1800-1914, and Victorian Decorative Glass British Designs, 1850-1914 by Mervyn Gulliver, but I don't have the books.
http://www.liveauctioneers.com/item/5715128So, I think Thomas Webb or Walsh Walsh so far... any thoughts very much appreciated.
m