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| 正面描述 | 登录 以查看详情 |
|---|---|
| 正面文字 | Devanagari, Latin |
| 正面铭文 | 登录 以查看详情 |
| 背面描述 | 登录 以查看详情 |
| 背面文字 | 登录 以查看详情 |
| 背面铭文 | 登录 以查看详情 |
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| 铸币厂 | 登录 以查看详情 |
| 铸造量 | 1971 - KM# 27.1 (Type 2; Calcutta Mint; narrow space to rim; 9 mm `10`) - 1971 * - KM# 27.1 (Type 2; Hyderabad Mint; narrow space to rim; 9 mm `10`) - 1971 ♦ - KM# 27.1 (Type 2; Mumbai Mint; narrow space to rim; 9 mm `10`) - 146,100,000 1972 - KM# 27.1 (Type 2; Calcutta Mint; narrow space to rim; 9 mm `10`) - 1972 ♦ - KM# 27.1 (Type 2; Mumbai Mint; narrow space to rim; 9 mm `10`) - 735,090,000 1972 B - KM# 27.1 (Proof; Type 2; Mumbai Mint; narrow space to rim, 9 mm `10`) - 7,895 1973 - KM# 27.1 (Type 2; Calcutta Mint; narrow space to rim; 9 mm `10`) - 1973 * - KM# 27.1 (Type 2; Hyderabad Mint; narrow space to rim; 9 mm `10`) - 1973 ♦ - KM# 27.1 (Type 2; Mumbai Mint; narrow space to rim; 9 mm `10`) - 1973 B - KM# 27.1 (Proof; Type 2; Mumbai Mint; narrow space to rim, 9 mm `10`) - 7,567 1974 - KM# 27.1 (Type 2; Calcutta Mint; narrow space to rim; 9 mm `10`) - 1974 * - KM# 27.1 (Type 2; Hyderabad Mint; narrow space to rim; 9 mm `10`) - 1974 ♦ - KM# 27.1 (Type 2; Mumbai Mint; narrow space to rim; 9 mm `10`) - 1975 - KM# 27.1 (Type 2; Calcutta Mint; narrow space to rim; 9 mm `10`) - 298,830,000 1975 ♦ - KM# 27.1 (Type 2; Mumbai Mint; narrow space to rim; 9 mm `10`) - 1976 - KM# 27.1 (Type 2; Calcutta Mint; narrow space to rim; 9 mm `10`) - 1977 - KM# 27.1 (Type 2; Calcutta Mint; narrow space to rim; 9 mm `10`) - 1977 ♦ - KM# 27.1 (Type 2; Mumbai Mint; narrow space to rim; 9 mm `10`) - 25,288,000 1978 - KM# 27.1 (Type 2; Calcutta Mint; narrow space to rim; 9 mm `10`) - 1978 * - KM# 27.1 (Type 2; Hyderabad Mint; narrow space to rim; 9 mm `10`) - 1978 ♦ - KM# 27.1 (Type 2; Mumbai Mint; narrow space to rim; 9 mm `10`) - 48,215,000 1979 - KM# 27.2 (Type 2; Calcutta Mint; Obverse: narrow space to rim. Reverse:large space to rim; 8 mm `10`) - 1979 * - KM# 27.2 (Type 2; Hyderabad Mint; Obverse: narrow space to rim. Reverse:large space to rim; 8 mm `10`) - 1979 ♦ - KM# 27.2 (Type 2; Mumbai Mint; Obverse: narrow space to rim. Reverse:large space to rim; 8 mm `10`) - 1980 - KM# 27.2 (Type 2; Calcutta Mint; Obverse: narrow space to rim. Reverse:large space to rim; 8 mm `10`) - 1980 - KM# 27.3 (Type 3; Calcutta Mint; large space to rim; 8 mm `10`) - 1980 * - KM# 27.3 (Type 3; Hyderabad Mint; large space to rim; 8 mm `10`) - 1980 ♦ - KM# 27.3 (Type 3; Mumbai Mint; large space to rim; 8 mm `10`) - 1981 - KM# 27.3 (Type 3; Calcutta Mint; large space to rim; 8 mm `10`) - 1981 ♦ - KM# 27.3 (Type 3; Mumbai Mint; large space to rim; 8 mm `10`) - 1982 - KM# 27.3 (Type 3; Calcutta Mint; large space to rim; 8 mm `10`) - 1982 * - KM# 27.3 (Type 3; Hyderabad Mint; large space to rim; 8 mm `10`) - |
| 附加信息 |
India's shift to aluminium-magnesium coinage in the early 1970s was driven largely by the rising cost of the cupro-nickel alloys previously used, combined with chronic small-denomination shortages in rural circulation. The Reserve Bank faced persistent complaints that low-value coins were simply vanishing from the economy — hoarded, melted, or lost — and the lighter, cheaper aluminium blanks were a direct policy response to that problem.
The 26mm diameter made these among the larger aluminium coins in circulation globally for their value, and the alloy's softness meant heavy wear accumulated quickly in active use. Examples from the final years of the series, 1981–1982, tend to survive in better condition as the denomination had largely lost practical utility by then.