I'd be a little concerned about the use of a straight cut to create of the rim of the vase. The rims I've seen have been more a nicely worked scallop. The shape seems a little off, too. Just noticed how big it is, and most of the pieces I have seen are much smaller.
It looks like Murano, from 50's or 60's, but I don't know enough to suggest a maker.
BTW, I read once that cordonato d'oro was the most copied style of the day, so a piece being cordonato d'oro doesn't automatically means it's Barovier and Toso. But all the cordonato d'oro I've seen has been pretty good,