Launched in 1915, completed in 1916, displacement 450 (surfaced)-670 (submerged) tons, horsepower 2.200 (surfaced)-850 (submerged) hp, oil-fired internal combustion machinery (surfaced)-electric machinery (submerged) and an armament of 1-1pd gun, 4 upper deck apparatus and 2 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.
