It is called a 'Love Knot'
I wouldn't worry too much about the absence of a label. The piece is signed and, I would say, your item will be 151 of 750 made. The scratches to the base of the one you link to will have been caused by moving the item around. If yours has been in an attic, it won't have been moved much.
When I bought a piece from the factory in Murano, it too had no label. I suppose I could have asked for one, but it was signed.