I wonder if the green reacts to the u.v. torch??
As John has already said, the style/form of the decoration appears very 'Egyptianesque' - something found on pieces which date to later than Dresser's period and found not uncommonly on art Deco material in the 1920s when interest in ancient Egypt was on a roll. This would also tie in with the shape to some extent. Dresser had long departed this world by then, and if you look at some of his decoration on materials they show quite complex and formal art nouveau patterns - but guess there is always the exception to the rule.
Dresser's foray in the world of glass can be seen in the form of Clutha and related crude colours and forms, rather than this 'toyland' type of pretty painting.
My opinion is that the decoration is rather na´ve, so possibly a cottage industry decorator - and perhaps French or Bohemian.
Sorry this is completely unhelpful