This flow chart somewhat gives a proper idea about the various types of Narrow-gauge Steam Locomotives used in Indian sub-continent over the years from 1904 to 1926. The chart shows photos of PL class, CC class, Delta class, W class, WT class and many more type locos which were used in Indian narrow-gauge system. For vivid description of most of these locos along with photos one may visit our Narrow-gauge Steam Locomotive Gallery.