I am glad our club website is being used! LEMONESCENT is the word that Thomas Webb used for a specific color combination, which included the red or orange top, with opalescent highlights and a uranium base. This has none of the red or orange in it, so it is not LEMONESCENT. Several factories made this kind of work, and as factory workers went from factory to factory (depending on work available, better pay, etc.), it could have come from any of the factories that made blown glass in the Stourbridge Region in England. I don't think it is Davidson, Sowerby, Greener or Burtles, Tate. More likely Richardson or Webb or a company in competition with them. 1900 sounds about right, give or take 10 years.