The classic diesel-hydraulic locomotive was first manufactured in 1967

Fifty years after India's only classic diesel-hydraulic series of locomotives -- popularly known as Pappu -- first made their debut on Mumbai's railway tracks, they have finally hit the brakes. But, instead of being shunted to a yard, the locomotives will now be stationed outside Bandra Terminus and Nalasopara station for public display. The WDS4 class diesel-hydraulic locomotives were originally produced by the Chittaranjan Loco Workshop in 1967, with bulk production taking off two years later.