Pamela
I have just looked through all my pictures but with no luck as I am sure I have had a pair of the Butterfly vases but in a blue pearline opalescent colour, cannot be sure they were exactly the same but think they were, I do not think Edward Moore made that type of glass, but Davidson , Greener , Burtles and Tate did , Sowerby made at least one item in a yellow vaseline opalescent.
My best guess would be from one either Davidson , Greener and a less of a chance Burtles and Tate
Roy