| Obverse description | Coat of arms of Panama with 9 stars, name of the country above, fineness, mintmark, and denomination below |
| Obverse script | Latin |
| Obverse lettering | REPUBLICA DE PANAMA
*********
PRO MUNDI BENEFICIO
LEY 0.500 FM
20 BALBOAS (Translation: Republic of Panama For the Benefit of the World 0.500 Purity) |
| Reverse description | Harpy eagle above date |
| Reverse script | Latin |
| Reverse lettering | 1985 |
| Edge | Reeded |
| Mint | FM Franklin Mint (The Franklin Mint), Wawa, Pennsylvania, United States (1964-date) |
| Mintage | 1985 FM - Proof - 817 1985 FM - Proof, FDC - |
| Catalog ID | 2445057880 |
| Comments |