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| Issuer | Government of India Mint |
|---|---|
| Year | 2006 |
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| Currency | Rupee (decimalized, 1957-date) |
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|---|---|
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| Reverse description | At center, the bold acronym 'ongc' is displayed in lowercase letters above the large numeral '50', within which the circular ONGC logo — depicting a stylized oil derrick — is incorporated. The design is flanked by decorative laurel branches extending along the lower half of the coin. The legend 'CELEBRATING INDIA' arcs along the upper periphery in Latin script, while the date range '1956-2006' appears in the lower center field. The Devanagari inscription 'उत्सवरत भारत' arcs along the lower periphery, commemorating the 50th anniversary of the Oil and Natural Gas Corporation. |
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| Edge | Reeded |
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| Additional information |
The Oil and Natural Gas Corporation was founded in 1956 as a commission under the Indian Ministry of Petroleum, converting to a full government corporation in 1961. By 2006, ONGC had become one of Asia's largest exploration and production companies, accounting for roughly 70 percent of India's domestic crude output. This commemorative was issued to mark the corporation's fifty-year anniversary.
The .500 fine silver specification was standard practice for Indian commemoratives of this period — a cost-control decision that kept official issues affordable while maintaining a silver content high enough to justify the metal designation.