| Issuer | Date | Desc | State | ||
| - | no image | Gabon | 4/9/1997 | empty sheet (#21888) | incomplete |
| - | no image | Gabon | 4/9/1997 | empty sheet (#21889) | incomplete |
| - | no image | Gabon | 4/16/1997 | empty sheet (#21890) | incomplete |
| - | no image | Gabon | 4/16/1997 | empty sheet (#21891) | incomplete |
| - | no image | Gabon | 4/16/1997 | empty sheet (#21892) | incomplete |
| - | no image | Gabon | 6/5/1997 | empty sheet (#21893) | incomplete |
| - | no image | Gabon | 8/11/1997 | empty sheet (#21894) | incomplete |
| - | no image | Gabon | 8/11/1997 | empty sheet (#21895) | incomplete |
| - | no image | Gabon | 8/11/1997 | empty sheet (#21896) | incomplete |
| - | no image | Gabon | 8/11/1997 | empty sheet (#21897) | incomplete |