Initially, one coach was painted in silver with scarlet mouldings, while the others were painted in royal blue with gold lines. The underframes of the coaches of the original rakes were built in England, while the coach bodies were built in the Matunga Workshop of the Great Indian Peninsula Railway. The service initially included first and second class seating, but the first class was replaced by a redesigned second class on January 1, 1949, until third class seating was introduced in June 1955. In 1966, the coaches were replaced by "anti-telescopic, steel-bodied integral coaches" built by Integral Coach Factory, Perambur, and the rake was lengthened to twelve coaches. Third class seating was re-designated second-class seating in April 1974.