Ordered in 1915 but not earlier launched as 3 March 1923 at the Sociedad Espanola de Construccion Naval at Ferrol due to lacking material caused by the First World War, commissioned in 1924 and stricken in 1963. Of the Blas de Lezo-class with as sister ship the Blas de Lezo (1). Displacement was 4.780 long tons or 4.860 tons standard and 3.856 long tons or 3.918 tons full load with as dimensions 462 x 46 x 14'4". The Parsons type geared turbines and 12 Yarrow boilers supplied 45.000 hp allowing a speed of 29 knots. With a speed of 13 knots she had a range of 5.000 nautical miles. The crew numbered 320 men. The original armament consisted of 6x6" guns, 4-47mm guns and 4x3-21" torpedo tubes placed above the waterline. In 1944 was she fitted out as a anti-aircraft cruiser and her armament changed into 8x1-120mm Vickers anti aircraft guns, 4x2-37mm and 2x4-20mm anti aircraft guns while 2x3 torpedo tubes were retained. Her superstructure was completely altered and she was fitted out with the newest fire control equipment. The armour consisted of a 2-3" belt, a 1"deck and the conning tower had 6" armour.
See for her sister ship the note titled "Spanish cruiser Blas de Lezo 1922-1932" published on this web log.