Luzzu,
I think Francisco is right. This variety is not what you usually call Dark Portuguese.
Over here has several names, but the most popular is "Colhões de Burro", that we can freely translate to "Donkey's Testicles", mainly because of its large size (some more than 200g).
A few photos a friend a mine that has the variety has sent me.
The fig has a large ostiole and if left on the tree it has a tendency to split, but with the right conditions it's a fairly good fig with good flavor.