sawi, your swan looks like it was made by Salviati, probably for Camer Glass. It is easy to tell the Barbini swans from the others, but harder to distinguish between the Salviati and Fratelli Toso swans. The FT swans tend to be made less carefully than the Salviati swans. The nice shape of the head on your swan and the style of bubbles says Salviati to me.