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| 正面描述 | The state emblem of the German Democratic Republic — a hammer and compass encircled by a wreath of grain — is prominently displayed in the upper field. Below the emblem, the country name DEUTSCHE DEMOKRATISCHE REPUBLIK is inscribed in three lines across the central field. The large denomination numeral 20 and the word MARK appear in bold relief beneath the legend, with the date 1980 placed in the lower field near the rim. |
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| 正面文字 | 登录 以查看详情 |
| 正面铭文 | DEUTSCHE DEMOKRATISCHE REPUBLIK 20 MARK 1980 |
| 背面描述 | The central field features a schematic diagram illustrating the optical path of light rays through a series of lenses, referencing Ernst Abbe's foundational work in optical theory and microscopy. The design depicts converging and diverging light beams passing through convex and concave lens elements rendered in precise engraved lines. The name ERNST ABBE curves along the upper rim in spaced capital letters. The birth and death years of the honoree, 1840 and 1905, are inscribed in the lower field separated by a small star ornament. |
| 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 | 登录 以查看详情 |