British firm Armstrong producing 30,5cm guns for new Brazilian battleships according to the Dutch magazine Marineblad dated 1907-1908 No. 9

An item reported that the at the plant of Arnstrong 34,3cm guns were manufactured of which was suspected that these were to be used for the St. Vincent-class were now the two Brazilians battleships toe be fitted out with each four of such guns. This meant that the Brazilian ships were not of the dreadnought design with a main armament of such one calibre.