New British Tribal-class destroyers to be armed with 13cm guns according to the Dutch magazine Marineblad dated 1936 no. 5

An item referred to the magazine R.M. dated July 1936 reporting that the new British destroyers of the Tribal-class were to be armed with semi-automatic 13cm guns. The newest automatic anti aircraft guns were able to fire 140-998 gram grenades pro minute.