Launched in 1916, completed in 1916-1917, displacement 258 (surfaced)-314 (submerged) tons, horsepower 700 (surfaced)-320 (submerged) hp, oil-fired internal combustion machinery (surfaced)-electric machinery (submerged) and an armament of 1-3” anti aircraft gun and 2-17.7” 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.
