| Obverse description | Name of the country, bust of Marshal José Félix Estigarribia facing and year of issue below |
| Obverse script | Latin |
| Obverse lettering | REPUBLICA DEL PARAGUAY
MCAL.J.F. ESTIGARRIBIA
1980 (Translation: Republic of Paraguay Marshal J.F. Estigarribia 1980) |
| Reverse description | Value above, dam on the Acaray River |
| Reverse script | Latin |
| Reverse lettering | 50
REPRESA ACARAY
GUARANIES (Translation: 50 Guaranies Acaray Dam) |
| Edge | |
| Mint | |
| Mintage | 1980 - Rare (Proof) - 10 |
| Catalog ID | 8555835620 |
| Comments |