Sentetsu Puresa-class locomotives

The Puresa class was a group of 14 steam tank locomotives with a 2-6-2 wheel arrangement, built in 1912 by the Borsig works of Germany for the Chosen Government Railway, known as Sentetsu, in Korea. The Pure name comes from the American naming system, under which locomotives with a 2-6-2 wheel arrangement were called Prairies. They were larger than the earlier Purei and Pureni classes, with greater coal and water capacity, and were the first locomotives in Korea to have Walschaerts valve gear. Like the previous types they were delivered in knockdown form and assembled at Sentetsu's shops in Busan. Sentetsu owned 227 locomotives of all Pure classes in total, with private railways owning another 52. After the liberation and partition of Korea the Puresa engines were divided between the Korean National Railroad in the South and the Korean State Railway in the North, and each railway gave them a new class designation, although which engines went where is unclear.