That does make sense, but I guess I was asking something else.
Maybe I should ask it this way... Of those makers mentioned above, that have similar decorations to my vases, are there many matched pairs out there accounted for, or that come for sale? In any reference books? or galleries?
I do not own any reference materials for Thomas Webb & Sons, Stevens & Williams or Bohemian Glass, so I have no idea what books would say in regards to that.
My expertise is Italian glass, so this type of glass is totally new to me.