These Venetian glass pieces can be so tough. Both Salviati and Barovier used gold. They worked with each other in the early histories of the companies. To make it more difficult, Fratelli Toso was right in there with them. Then AVeM... and so on. Unless I can find the exact piece in a catalog, I just call them Venetian glass and don't try to take it any further. Your dish looks more like a Salviati piece to me in the square shape and the Bohemian-style applied glass. Saliviati had some glass with small amounts of uranium in the late 1900s, so we know it was used. (If I understand the history correctly, the Barovier brothers were the people who made the Salviati glass at this time. It gets confusing when histories run together.)