Three Goro-class locomotives were built in 1923 by Kisha Seizō of Japan for Sentetsu,[3] delivered in 1924.[1] Initially numbered 61-63, they received the ゴロイ1 through ゴロイ3 numbers in Sentetsu's general renumbering of 1938.[1]
After the partition of Korea, all three Goroi-class locomotives went to the Korean State Railway in North Korea, where they were designated 고로하 (Koroha) class and numbered 고로하1 through 고로하3.[4]
^ abcByeon, Seong-u (1999). 한국철도차량 100년사 [Korean Railways Rolling Stock Centennial] (in Korean). Seoul: Korea Rolling Stock Technical Corp.
^Colvin, Fred H. (1906). The railroad pocket-book: a quick reference cyclopedia of railroad information. New York, Derry-Collard; London, Locomotive Publishing Company (US-UK co-edition).
^Yamada, Keitarō (1972). 汽車会社蒸気機関車製造史 [Manufacturing History of Kisha Kaisha Steam Locomotives] (in Japanese). Nagoya: Kōyūsha.