The One Rupee coin of Republic India in copper-nickel is a definitive (regular-issue) coin that was struck across several mints, including the Royal Mint in London and the Mumbai (Bombay) Mint. Many examples carry the coin's characteristic security edge and can be found in grades up to About UNC and UNC.
Collectors look closely at the mint and the year, because a particular mint-and-year combination in high grade can sit well above a common circulated example. That is why the mint (where known) and the state of preservation matter so much when pricing one of these coins.
Value depends on the exact year, mint, edge type and condition, so an uncirculated coin with clean surfaces is worth more than a worn one. Coinbazzar lists verified copper-nickel One Rupee pieces, so you can compare grade and buy the coin shown on this page, with its price displayed live.