Launched in 1919, displacement 960 (surfaced)-1.150 (submerged) tons, horsepower 2.400 (submerged)-1.600 (surfaced) hp, oil-fired internal combustion machinery (surfaced)-electric machinery (submerged) and an armament of 2-4” guns and 6 torpedo tubes.
Source
Archive Dutch Naval Staff 1886-1942 (National Archive at the Hague, Netherlands) inventory number 155. Fleets (the British Empire and foreign countries) on 1 February 1923.
