20 Mark Jacob and Wilhelm Grimm
€1.00
| Issuer | German Democratic Republic |
| Year | 1986 |
| Type | Non-circulating coin |
| Value | 20 Mark (20 DDM) |
| Currency | Mark (1948-1990) |
| Composition | Silver (.625) |
| Weight | 20.9 g |
| Dimensions | 33.0 mm |
| Thickness | |
| Shape and Technique | Round Milled |
| Orientation | Medal alignment ↑↑ |
| Engraver(s) | Sneschana Russewa-Hoyer, Heinz Hoyer |
| In circulation to | 1990 |
| Reference(s) | KM#108 |