| Issuer | Date | Desc | State | ||
| - | no image | Ecuador | 8/16/1977 | empty sheet (#20745) | incomplete |
| - | no image | Ecuador | 8/24/1977 | empty sheet (#20746) | incomplete |
| - | no image | Ecuador | 9/1/1977 | empty sheet (#20747) | incomplete |
| - | no image | Ecuador | 9/1/1977 | empty sheet (#20748) | incomplete |
| - | no image | Ecuador | 9/13/1977 | empty sheet (#20749) | incomplete |