To go back to Ardy's original question. Yes, Cenedese pieces were often signed, but not by "him." Gino trained as a glass blower, but only designed and did not make glass in the 50's. The current company was a result of a reorganization of in 1973 by Gino's son, Amelio, following the death of the father, and renamed Gino Cenedese & Figlio, still in business, I think, at
http://www.cenedesegino.it/eng/index.htmMy recollection is that Amelio is a businessman and administrator. The picture in Ardy's photo I would think is later Cenedese, 80-90's.
The Albarelli connection would seem to be from about 1992, as Articifice suggests, when Cenedese bought the name Seguso Vetri D'Arte from Albarelli, who had owned the company since 1976. Albarelli kept the property. I would guess that Cenedese & Albarelli was a short lived business arrangement, despite producing what seems to have been some quality pieces.
There is a company on eBay, Design-and-arts, who offer stock somehow connected to this 1993 merger. They have a fair amount of SVA and Cenedese. I once saw pictures of their warehouse. I'd love to be left in there for a while.
David