previously. 2019 Grain Series The Ministry of Finance has issued a notification on March 6 announcing the launch of 5 new coins in the country, namely the new 1, 2, 5, 10 and 20. The new series of coins are accessible to those with visual impairments and have an enhanced design. The coins were launched by PM Narendra Modi and Finance Minister Arun Jaitley. The design of the coins were prepared by the National Institute of Design while Security Printing and Minting Corporation of India Limited and the Ministry of Finance played the key role in the introduction of new coins in the country. Various new features have been incorporated in the new series of circulation coins to make them more easy for the visually impaired people to use. The coins are characterized by increasing size and weight from lower to higher denominations from 1 to 20. All of the denominations would be of round shape, except the newly included coin of 20, which will be a 12 sided coin with no serrations. Mints Each currency coin minted in India (and anywhere in the world) has a special mint mark on it to identify the mint. Domestic Mint Marks Foreign Mint Marks Due to the increasing demand for the circulation of coins, the Indian government was forced to mint coins in foreign countries at various points in the country's history. Commemorative coins The first Indian commemorative coin was issued in 1964 in remembrance of Jawaharlal Nehru's birth anniversary. Since then, numerous coins from 5 paise (INR 0.05) to ₹1000 (INR 1000.00) have been issued. These coins based on birth or death centenary of famous personalities or on recently died, commemoration of special government programs or sport events, anniversaries of historical incidents, government organisation etc. List of Commemorative Coins Note: Bold Marks are Silver Coins, Mint index: K = Kolkata (no mark), H = Hyderabad (⋆), M = Mumbai (◆ or B), Noida = (●). Controversies Controversy over 2006 two-rupee coin The two-rupee coin issued from 2006 by the Reserve Bank, in stark contrast to the earlier coin, is rounded and simpler in design, without the map of India. The coin has already been criticized for being difficult to recognize by the visually impaired. Most controversially, it features an equal-armed cross with the beams divided into two rays and with dots between adjacent beams. According to RBI, this design represents "four