Submarine for Portuguese account built in Italy according to the Dutch magazine Marineblad dated 1910-1911 no. 7

An item reported that in Italy a submarine was built for Portuguese account with a displacement of 245 (surfaced)-300 (submerged) tons and as dimensions 45,15 x 4,20 metres. Speed 8 (submerged)-13 (surfaced) miles. To fitted out with 2 periscopes.