Thanks for your advise, David.
My piece measures 10" in height where as the dr Fischer piece measures 11.5", and differs slightly in shape. However when you're looking to the pieces from eg. the emergence series, they also differ in shape and size slighly from piece to piece. This is to be expected, as they are freeblown pieces, so will never be perfectly identical.
As to the age, I bought the piece from a dealer who got it from an estate sale. The people from the estate said the piece had been in the family for at least 25 years. Also the piece shows wear according to this age (not only on the bottom, but also slight scratches and blemishes on other parts of the object. I've handled quite some pieces of glass, and I don't think this is any modern reproduction. It just feels right.
The fact that it is not signed lead me to this forum for confirmation. However, I have seen more pieces of Labino which haven't been signed (the glasmuseum in Leerdam, Holland has a 1966 vase, which I think is unsigned). I guess I have to show it to an expert. Does anybody here know a leading expert on Labino? Any further info is welcome.