As i blogged on the 4th of December 2014 (here) that Aluminium is not equal to Aluminium,
meaning that Alloys come in a wide range.
One person reacted.
For this One person, i will take a bit of my time to write this Post.
Look what i found Lucio!!!
In 1955, the "ice crusher for domestic use" of Giordano Robbiati
was made out of Peraluman 3.
(more infos about Peraluman here)
Of course, we can't conclude that the coffee makers were also made of the same alloy,
but it comes strongly within the range of possibility.
Interest in Alloys?:
Qualital Kft in Hungary were making its coffee makers out of Silumin (here).
PS: After the Citrus Fruit Press (here), the Car Bell (here), it is nice for me to see another item that the Ditta Robbiati - "Officina mecanica e fonderia in legghe legere" - were casting.
Just for info:
The Bacchi i use at home is principally made out of Peraluman 30.