| Issuer | Date | Desc | State | ||
| - | no image | Ecuador | 7/9/1981 | empty sheet (#20774) | incomplete |
| - | no image | Ecuador | 7/9/1981 | empty sheet (#20775) | incomplete |
| - | no image | Ecuador | 10/26/1981 | empty sheet (#20776) | incomplete |
| - | no image | Ecuador | 10/26/1981 | empty sheet (#20777) | incomplete |