Collection of Indian Rupee Error Coins

Kondapaneni Sankara Rao S/o Late Seethaiah born on 8th January 1960 from Ibrahimpatnam, Hyderabad, Telangana, India. He has set a tremendous record by collecting Indian republic error coins from the past 30 years and he has collected up to 600 plus coins error description, denominations and mint described it clearly on coin holders and also he inserted in albums, from 4 mints in Hyderabad, Bombay, Calcutta, Noida.