Launched in 1919, completed in 1922, displacement 335 (surfaced)-502 (submerged) tons, horsepower 1.020 (surfaced)-460 (submerged) hp, oil-fired internal combustion machinery (surfaced)-electric machinery (submerged) and an armament of 1-3pd gun and 4 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.
