[2] The Pureshi class consisted of 46 Purei-class locomotives rebuilt by Sentetsu's Gyeongseong Works from 1925.

Major modifications included increasing the size of the firebox to allow the use of lignite, which has a lower caloric value than anthracite coal.

The performance was found to be good, and eventually 46 Purei class locomotives were rebuilt to Pureshi standard.

The redesign work also gave Sentetsu engineers important experience, which was later applied to the design of the Pashishi and Mikasa-class locomotives.

After the Liberation and partition of Korea, the Pureshi-class locomotives were divided between North and South, but the specifics of which engine went where are unclear; those going to the Korean National Railroad in the South would be designated 푸러4 (Pureo4) class, those with the Korean State Railway in the North would be designated 부러너 (Purŏnŏ) class.