Launched in 1914, completed in 1916,displacement 740 (surfaced)-1.100 (submerged) tons, horsepower 2.600 (surfaced)-1.200 (submerged) hp, oil-fired internal combustion machinery (surfaced)-electric machinery (submerged) and an armament 2 torpedo tubes, 4 dropping gear and 8 torpedoes.
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.
