The engine that will serve as a base for the future KP2 and C2 classes was born in 1930. The Kolomenski Zavod workshops, Russian locomotive builders since 1869, produced the 159 type. This four-axle locomotive was designed for 750mm gauge track, featured side tanks and a separate tender. It was superheated. The specifications restricted the axle load to 4 tons. One thousand units were produced until 1941.
That year, a more powerful version was released, known as P24. It was fitted with a larger boiler and improved superheating. It’s larger mass required a bigger tender, as the 4 ton axle load limit meant the side
