Spanish cabinet ordered submarine from the Fore River Company, Quincy, Massachusetts, USA according to the Dutch magazine Marineblad dated 1915-1916 no. 3

An item reported that the Spanish cabinet ordered the Fore River Company, Quincy, Massachusetts, USA to built a submarine of 750 ton, a speed of 18 (surfaced)-11 (submerged) miles, quick firing guns and rotating torpedo tubes.