The coins of the above denominations mentioned in rule 2 shall conform to the following dimensions and composition, namely:- Denomination of coins Shape and outside diameter Number of serrations Metal composition
(1) (2) (3) (4) One Rupee Circular 20 Milli-meters NIL Ferritic Stainless Steel Containing Iron -83%, Chromium -17% Two Rupees Circular 23 Milli-meters 50 wider serrations on edge Ferritic Stainless Steel Containing Iron -83%, Chromium -17% Five Rupees Circular 25 Milli-meters NIL Nickel Brass Copper: 75% Zinc: 20% Nickel: 05% 6 THE GAZETTE OF INDIA : EXTRAORDINARY [PART II—SEC. 3(i)] Ten Rupees Circular 27 Milli-meters 100 Serrations on edge OUTER RING Nickel Brass Copper: 75% Zinc: 20% Nickel: 05% CENTRE PIECE Nickel Silver Copper: 65% Zinc: 15% Nickel: 20% Twenty Rupees 12 Edged (Polygon) 27 mm NIL OUTER RING Nickel Silver Copper: 65% Zinc: 15% Nickel: 20% CENTRE PIECE Nickel Brass Copper: 75% Zinc: 20% Nickel: 05%