I think I know the answer, but I'm going to ask the question: Vasart, Strathearn or Vasart/Strathearn crossover? I suspect late Vasart/early Strathearn. The turquoisey blue ground is sold, the dome is high, the cane dome is distinctly lop-sided, the base is fire polished (the white bit is white glass) but has been done so there is a little ledge on one side and the metal is nice and colourless. Size 2.25 in diameter.