1972 Proof Set of 25th Anniversary of Independence, Set of 9 Coins, Bombay Mint (Rajgor RB# 31). Without Data Card and Envelop, Rare. For latest catalogue on all these Republic of India Coin Sets, refer the new book, Standard Guide to Coin Sets of India by Dilip Rajgor, Ravi Shankar Sharma and Manish Agarwal.