There's a dish of identical form/technique, with the blue 'split' running down the middle, illustrated in Franco Deboni's 2-volume Venini Glass (Illus. 171 in Catalogue 1921 - 2007), but with different murrines. As Ivo says, the form is a Paolo Venini one - designed c.1959.
In the same volume, illustrations 169 and 173, both designed by Tobia Scarpa c.1960, do use the same murrines as seen above.