Sentetsu Purei-class locomotives

The first 18 Prairie-type locomotives delivered to Korea were built for the Gyeongbu Railway by the Baldwin Locomotive Works of the United States, with the first units arriving in 1901; they were numbered simply 1 through 18. A further 52 were delivered in 1906 to the Temporary Military Railway, of which 48 were assigned to the Gyeongui Line and four to the Masan Line.^[3] These were delivered from Baldwin in knockdown form, and were assembled in Korea by the Gyeom-ipo and Incheon Shops.

The Gyeongbu Railway was nationalised to create the Chosen Government Railway on 1 July 1906, and the Temporary Military Railway was absorbed by Sentetsu on 31 August 1906, and all 70 of these locomotives entered service with Sentetsu.^[3] Seven were subsequently transferred to private railways,^[3] though all but one eventually returned to Sentetsu. They were used by Sentetsu on both passenger and freight trains all over Korea. From 1925, a number were rebuilt to Pureshi class for operation with domestic lignite.^[4] 24 Purei-class locomotives remained unrebuilt, and these were numbered 221 through 254. Only 23 were left in service at the time of Sentetsu's 1938 general renumbering; these were renumbered プレイ1 through プレイ23 at that time.^[5]

After the Liberation and partition of Korea, they were divided between North and South, but the specifics of which engine went where are unclear.

At least four Purei-class locomotives ended up with the Korean National Railroad in the South after the division of Sentetsu's motive power following the partition of the country; these were designated 푸러1 (Pureo1) class by the KNR.^[5]

The locomotives taken over by the Korean State Railway in the North were initially designated 부러하 (Purŏha) class; they were later renumbered in the 1100 series. The total number, their service lives and subsequent fates are unknown.