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| 正面描述 | Central device features the Sudanese national emblem: a secretary bird with outstretched wings displayed, bearing a shield on its breast and clutching a ribbon with Arabic inscription below. The denomination appears in both Arabic numerals (٥٠) to the left and Latin numerals (L.S. 50) to the right of the central emblem. The legend 'جمهورية السودان الديمقراطية' (Democratic Republic of the Sudan) arcs above, with 'النصر لنا' appearing on the ribbon. Hijri and Gregorian dates (١٣٩٨ / ١٩٧٨) are inscribed in the lower field. The coin has a reeded border. |
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| 正面文字 | 登录 以查看详情 |
| 正面铭文 | 登录 以查看详情 |
| 背面描述 | Central device depicts a map of the African continent set within a circular frame, flanked by two olive or laurel branches forming a wreath. Below the map appears a decorative panel or tablet. The legend 'SUMMIT MEETING KHARTOUM' arcs around the upper periphery in Latin script, while the Arabic legend 'منظمة الوحدة الأفريقية' (Organization of African Unity) and the abbreviation 'OAU' appear in the lower field. The design commemorates the Organisation of African Unity Summit held in Khartoum. The coin has a reeded border. |
| 背面文字 | 登录 以查看详情 |
| 背面铭文 | 登录 以查看详情 |
| 边缘 | 登录 以查看详情 |
| 铸币厂 | 登录 以查看详情 |
| 铸造量 | 登录 以查看详情 |
| 附加信息 |
The Organisation of African Unity's summit was hosted by Sudan in 1978, and this essai — a trial strike never approved for circulation — appears to have been produced in anticipation of a commemorative issue that ultimately went no further. Pattern and essai pieces from Sudanese state institutions of this period are poorly documented, and KM# Pn20 surfaces rarely enough that auction appearances remain the primary record of its existence.