Mumbai’s Rajabai Clock Tower is an iconic part of the city’s architectural history. Built in 1878, it was once the city’s tallest monument. Now, it stands in the University of Mumbai campus and holds the status of a Unesco World Heritage Site. The clock is not powered electronically, and must be wound manually. Electrician Mahendra Prasad Gupta, an employee of VS time Service - the company that maintains the clock - has ensured it doesn't stop ticking. Video by Dipali Jagtap, Sharad Badhe and Sh