This is an old big-size 10 Rupee note, popularly called a "Fafda" note for its large format. It belongs to the earlier Reserve Bank of India issues that predate the smaller modern note, and different issues carry the signature of the Reserve Bank Governor of the day.
Vintage large-format notes like this are prized because they predate the smaller modern format, and each signatory and series variety adds to the story of India's early paper currency. Serial ranges, insets and the signatory all matter to collectors, and clean, uncreased examples are increasingly hard to source.
Condition drives value here more than anything: crisp, bright notes with strong paper and clear signatures sit well above limp, folded ones, and scarcer varieties add a premium. Coinbazzar lists verified big-size 10 Rupee notes, so you can watch the video, check the exact note's signatory and grade, and buy the piece you see.
