Launched in 1916, completed in 1917, displacement 397 (surfaced)-460 (submerged) tons, horsepower 480 (surfaced)-320 (submerged) hp, oil-fired internal combustion machinery (surfaced)-electric machinery (submerged) and an armament of 1-3”anti aircraft gun, 2-18: torpedo tubes and 18 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.
