Maybe just a couriousity:

Just spoke to my workmate who ha a Alfa Romeo fr the 70`s.
Rumours among his friends is that there were 2port Webers made in both Italy & Spain
during the 70-80`s.
The Spain ones has a reputation to of being less quality, true or false?
Are there any Spanish Webers on Paso 750/906?

Can't answer that one Gert. The auto union struggles in Italy from the late 50's to early 70's caused many issues. While Alfa worked with the unions to find a settlement, Fiat the owner of Weber since 1952 decided union busting was the way to go. Fiat was moving production more and more away from Italy in an effort to destroy the unions influence. Did Alfa manage to get all the Webers from Italy? Certainly not after 1990. I know of no way to establish a Weber's country of origin reliably. If it looks like a Weber but says Del Orto and smells like fuel leaking it was made in Italy or India

If it is made by Weber, it has the Country of origin stamped on it, NO doubts about that.

It is easy to spot, the manufacturing Country is stamped on the cover.

all Pasos 750-906 were manufactured PRIOR 1990 therefore I believe any webers fitted to be made in Italy and from what i remember (I might be wrong...) that particular carburator was not manufactured in Spain

There is one thing I was told long time ago, in the car Vintage club circuit (my dad is president of a major club, and I have been quite involved), it appears that there are FAKES, COUNTERFITS.

It is unlikely they ended on Pasos, they were copies made to go on more important cars.

Here there is a very interesting Webpage on the subject, it needs verification, nevertheless it is worth reading.

http://genuineweber.blogspot.com/