I think this is a rather exceptional piece and believe it is Webb Stourbridge and dates to about c1900....unsigned, and I have never seen another. Excellent condition and super fine green cut to clear florals and wavy vine as shown. Notched zippered stem.....very fine work. Also the base has engraved vines. I cannot see any marks. About 5 3/8" tall and 2 3/4" diameter bowl. Rings like a super high pitched bell if tapped. Top quality example.
Art Nouveau Webb Green Cut to Clear Engraved Wine Glass Stem