1 Rupee, George V, 1921/22
1 Rupee silver coins of George V, minted in 1921 & 1922, which are rare years. George V silver rupees were minted from 1911-1922. The number of 1 rupee coins minted during other years was anywhere from 50-200 million, but in these two years, just 5 million and 2 million coins were minted, making them rarer and costlier compared to other years.
Read more here