From TrainSpottingWorld, for Rail fans everywhere
A 3 ft gauge 2-4-0 built for Central Sucre by the Vulcan Iron Works.

In Whyte notation, a 2-4-0 is a railroad steam locomotive that has two leading wheels followed by two coupled driving wheels, with no trailing wheels.

The equivalent UIC classification is 1'B.

In the UK several classes of 2-4-0s were designed by James Holden for the Great Eastern Railway, including the T19, the "Humpty dumpty" and the T26.