No one has responded, so I thought I would say something. This is an interesting subject, because few people know of the transitions of Seguso VDA in the early 1970s. Albarelli is a mysterious character to me. I am not sure what he did beyond buying a portion of Seguso, then later the whole company in the early 1970s, then selling it to Cenedese, but holding the land until he finally sold it to Formia. I have seen his name on three pieces of glass, but I don't know if it meant he had anything to do with the design or if it was just one of the Seguso company names. I also can't figure out when Albarelli came into the picture. He was probably around before he began purchasing the companies, but what did he do? I remember looking into it once before, but couldn't come up with any solid answers.
If it is one of the transition companies, Tami, you are probably right that it would be early 1970s.