This is a heavy, highest quality little bowl with polished base, but lacking any signature. The Scandinavians were SO good about engraving names on these sorts of pieces (Kosta, Stromberg, Orrefors, Iittala, etc.), whereas the Italians with the exception of Venini virtually never signed with anything but paper labels. However, I'm not aware of Murano producers using this typically Scandi bubble technique. Could someone set me straight?