20 Zlotys Interkosmos `78
€8,411.00
| Issuer | Poland |
| Year | 1978 |
| Type | Circulating commemorative coins |
| Value | 20 Zlotys (20 Złotych) (20 PLZ) |
| Currency | Third Zloty (1949-1994) |
| Composition | Copper-nickel |
| Weight | 10.15 g |
| Dimensions | 29 mm |
| Thickness | 2.05 mm |
| Shape and Technique | Round Milled |
| Orientation | Medal alignment ↑↑ |
| Engraver(s) | Obverse: Józef Markiewicz-Nieszcz Reverse: Ewa Olszewska-Borys |
| In circulation to | 1 January 1995 |
| Reference(s) | Y#97, ParM#250, Schön#90, Fischer Po#OB075 |