Thankfully, there are fantastic digital projects dedicated to cataloging and preserving India's rich film history, serving as the very "old Bollywood movie indices" you are seeking. Here are some of the best resources, each offering a unique way to explore:
A visually stunning, music-heavy masterpiece centered around the life of a courtesan. old bollywood movie index
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“The official records just give you names and dates,” Arun would tell the few visitors who ventured in. “The Index gives you a heartbeat.” Try again later