Hi John,
very nice colours!
One of the few downsides of the otherwise great Heiremans book: not all models are found in the book; even a good part of the pieces pictured in the catalogue section are not found in the black-and-white selective model list or the model drawings (but they do have a pattern number assigned , so there has to be a reference somewhere).
So, even with the book it is impossible for us collectors to descern if a piece which is not found in the book may still be Seguso Vd'A.
At least the nice chapter about colour combinations and techniques gives some good hints for attribution, so I don't see a reason why your lovely bowl should not be Seguso.
Cut designs seem more common in the Pinzoni than in the Poli era, though...
Michael