This war ship paper model is Norwegian Sleipner Classdestroyer, the papercraft is designed by Louis R. Coatney. The Sleipner class was a class of six destroyers built for the Royal Norwegian Navy from 1936 until the German invasion in 1940. The design was considered advanced for its time, and it was the first class of vessels for the Norwegian Navy that used aluminium in the construction of the bridge, the mast and the outer funnel. Extra strength special steel was used in the construction of the hull. Unlike the earlier Draug class the Sleipner class had comparatively good capabilities in both main guns, anti-aircraft artillery and anti-submarine weapons. The class was named after Sleipnir, the eight-legged horse of Odin.
The armament within the class varied slightly. Æger had the armament listed in the article info-box. Sleipner, the lead ship of the class, carried just two 10 cm guns and could not elevate them for use as anti-aircraft weapons. Gyller had two extra torpedo tubes, for a total of four. Odin had a 20 mm anti aircraft gun instead of a 40 mm. Balder and Tor had not been finished when the Germans attacked, and it is not known if any changes in armament were planned.
Although classified by the Norwegians as destroyers they have been widely regarded as torpedo boats because of their displacement and armament.
You can download the ship papercraft here: WWII Sleipner Class Destroyer Free Ship Paper Model Download