CV — Not serrated vertical applied trails but notched ribs formed in a dip mould. If you look at the notches under a glass you will see the lovely faint striations made by the cutting wheel that add an extra sparkle to the piece. The shape of this vase was quite variable, depending on where the glassblower reheated the ribbed tube and how much he blew out the thinner glass between the thick ribs.
Such notched ribs were a feature of a quite wide range made by Stevens & Williams, dating certainly to the first quarter of the 20th century, possibly slightly earlier and later. This particular vase is best known with an unfinished rim as sold by S&W to silversmiths for the fitting of a silver rim, and not notched. I've seen examples with hallmarks ranging from 1908 to 1912, so I think your vase is most likely to date from the same period. Yours, notched, with what seems to be a nicely ground, chamfered and polished rim, would have been sold directly by S&W to its more usual customer base.
I hope that helps.
Bernard C.
