[2] The Pureni class was introduced in 1905, with nine built in the United States by the Brooks Locomotive Works.
[citation needed] Unlike the Purei class, the Pureni had a superheated steam boiler.
These, like the 1906 batch of Purei class locomotives, were delivered in knockdown form and assembled at the Incheon shops.
At least three Pureni-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 푸러2 (Pureo2) class by the KNR.
[4] The locomotives taken over by the Korean State Railway in the North were initially designated 부러두 (Purŏdu) class; they were later renumbered in the 1200 series.