Thanks Mike, it's a nice little vase. If they had the moulds it could have been made by Davidson.
I would have thought that once the ingredients for the glass were mixed and heated they would have stayed as the intended colour and not separated out. I don't know enough about the process,
that's why I thought it may have been white mixed with clear, perhaps as you say they were experimenting.
I have a small 'nipple' basket in a caramel and white mix. I always thought these were made by Moore purely because of the number of variation of colours seen. I have seen them in over twenty different colours.
Mike