Starting in 1904, Burma Railways received two classes of 4-6-0 locomotives with BESA standard boilers. While class J was built for mixed traffic, class K shown here was intended only for goods traffic. Up to 1914, a total of 75 class K locomotives were built by Nasmyth Wilson, North British and Stephenson. In World War I, 13 were sent to Mesopotamia and never returned to Burma.
flickr/Historical Railway Images 
From 1920, 34 superheated Ks have been built, of which seven were built in Germany by Rheinmetall. Also many locomotives of the original class K were superheated. With a total of 109, they were the second most numerous class of Burmese steam locomotives after class F. After World War II, around 30 were still in service. 