He builds skylines for a living. But for 60 years, Rezwan Razack has quietly built something else entirely — India's finest collection of paper currency. It started with a single stamped, rejected banknote found in a family safe, one his father and grandfather couldn't explain. That unanswered question set a real-estate developer, Vice Chairman of Prestige Group, on a six-decade parallel path as one of India's most serious currency historians — a tension between "aggressive, young builder" and "quiet archivist" that runs through this entire conversation. In this episode, Rezwan walks us through India's monetary history across four regimes: colonial British India, the semi-autonomous princely states (including Hyderabad's own currency), the transitional Partition-era overprints, and the modern Republic, right up to the 2016 demonetisation. He recalls being an ordinary citizen brushing up against a moment of major, deliberately secret state decision-making, and reflects candidly on India's weak culture of heritage preservation — a line that lands as close to a personal philosophy as anything else in the episode. Rezwan is the author of three books, including One Rupee: 100 Years, winner of the IBNS Book of the Year in 2017, and founder of the Museum of Indian Paper Money in Bengaluru, India's only museum dedicated entirely to currency history. He also shares a preview of a forthcoming book, plus his advice to young collectors and archivists.