Launched in 1921, completed in 1921, displacement 930 (surfaced)-1.280 (submerged) tons, horsepower 2.900 (surfaced)-1.640 (submerged) hp, oil-fired internal combustion machinery (surfaced)-electric machinery (submerged) and an armament of 1-3.9” gun, 6 torpedo tubes and if necessary 27 mines.
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.
