An item referred to the magazine Schiffbau dated 3 October 1928 reporting that the Argentinean cabinet ordered the building of 3 submarines by the shipyard Tosi, Tarente, Italy. Their displacement was to be 780 (surfaced)-990 (submerged) tons, a horsepower of 3.000 hp, a speed of of 9 (submerged)-17 (surfaced) miles and an armament consisting of 6-53,3cm torpedo tubes and 1-10,3cm guns.
