Hi
This is a sommerso vase in similar colours purple and blue c1950 – 60s with G Hardy Venetian Import label on. It has enough in common with yours I think to give a Venetian /Murano attribution. As to maker, I have asked to no avail – hope you have more luck.

Your bowl is very beautiful and a while guess from me would be Seguso Vetri d’Arte
I feel the slight sommerso smudge is very minor
Adam P