| Krause number | KM# 75 |
|---|---|
| Country | Germany - GDR |
| Period | East Germany (DDR) (1948 - 1990) |
| Coin type | Commemorative coins |
| Denomination | 20 mark |
| Year | 1979 |
| Subject | 30th Anniversary of GDR |
| Composition | Copper-Zinc-Nickel |
| Edge type | Lettered |
| Edge description | '20 MARK * 20 MARK * 20 MARK * 20 MARK *' |
| Shape | Round |
| Alignment | Medal (0°) |
| Weight (g) | 15 |
| Diameter (mm) | 33 |
| Thickness (mm) | 2.6 |