rare coins collection Issuer India Period Republic (1950-date) Type Circulating commemorative coin Year 1980 Value 10 Paise (0.10 INR) Currency Rupee (decimalized, 1957-date) Composition Aluminium Weight 2.3 g Diameter 26 mm Thickness 1.92 mm Shape Scalloped (with 12 notches) Technique Milled Orientation Medal alignment ↑↑ Demonetized 30 June 2011 Reverse Woman threshing grain NOTE: Different mintmarks ♦ (small dot/diamond) = Mumbai B (letter "B") = Mumbai Proof Issues (no mintmark) = Calcutta * (five-pointed star) = Hyderabad Lettering: Rural Women's Advancement ग्रामीण महिलाओं की प्रगति 1980