Ok1 is the Polish designation of a

Prussia Prussia (; ; Old Prussian: ''Prūsija'') was a Germans, German state centred on the North European Plain that originated from the 1525 secularization of the Prussia (region), Prussian part of the State of the Teutonic Order. For centuries, ...

steam locomotive A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, Fuel oil, oil or, rarely, Wood fuel, wood) to heat ...

, the

Prussian P 8 The Prussian Class P 8 of the Prussian state railways (DRG Class 38.10-40 of the Deutsche Reichsbahn) was a 4-6-0 steam locomotive built from 1906 to 1923 by the Berliner Maschinenbau (previously Schwartzkopff) and twelve other German factories. ...

, used on

Polish State Railways The Polish State Railways ( , abbr.: PKP S.A.) is a Polish state-owned holding company (legally a sole-shareholder company of the State Treasury) comprising the rail transport holdings of the country's formerly dominant namesake railway oper ...

. Production of the P 8 lasted from 1908 until 1928 and this locomotive was used on practically all European railway lines. After the end of

World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...

, 192 Class P 8 engines were handed over as a reparation to Poland, including two machines for

Free City of Danzig The Free City of Danzig (; ) was a city-state under the protection and oversight of the League of Nations between 1920 and 1939, consisting of the Baltic Sea port of Danzig (now Gdańsk, Poland) and nearly 200 other small localities in the surrou ...

, where they were re-designated as Class Ok1 locomotives (numbers: Ok1-1 to Ok1-190 and Ok1-1Dz and 2Dz for Danzig machines).Terczyński, P. (2003), pp. 52, 56 Since the class was considered successful, further 65 locomotives were built in Germany at Polish order in 1922-1923 (designated Ok1-201 to 265). During

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

all the locomotives were captured by the Germans or Soviets and most were pressed into the German Railways. After the war, along with new war reparations, Poland received 429 locomotives P 8 (numbers Ok1-1 to 429), what made it by far the most numerous passenger locomotive in the country. They were used until the late 1970s - last locomotive was withdrawn from line service in 1981. A few engines were preserved, including Ok1-359 (see the photograph), which is stabled at the Wolsztyn museum.

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* Railway locomotives introduced in 1908 4-6-0 locomotives 2′C h2 locomotives Ok01 Berliner locomotives Passenger locomotives Standard-gauge locomotives of Poland Linke-Hofmann locomotives {{poland-rail-transport-stub pl:Ok1

See also

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