1962 Proof Set of 7 coins, Pice, 2, 5, 10, 25 and 50 Naya Paise and Rupee, Bombay Mint. Proof, in immaculate condition (slight weather effect in 1 naya paise) within original cardboard case of issue, Very Rare. During the time of introducing the decimal series in 1957, the Paisa was called Naya Paise for people to distinguish from the old non-decimal Paisa to the newly introduced Naya Paise. But Later in 1964 the word Naya was dropped.