| 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
FM
500/1000 ORO FINO
20 BALBOAS (Translation: Republic of Panama For the Benefit of the World 500/1000 Fine Gold) |
| Reverse description | Figure 8 butterfly below date |
| Reverse script | Latin |
| Reverse lettering | 1981 |
| Edge | Smooth |
| Mint | FM Franklin Mint (The Franklin Mint), Wawa, Pennsylvania, United States (1964-date) |
| Mintage | 1981 FM - - 205 1981 FM - Proof - 4 445 1981 FM - Proof, FDC - |
| Catalog ID | 3697648570 |
| Comments |