| Issuer | Date | Desc | State | ||
| - | no image | Ecuador | 1976 | empty sheet (#20740) | incomplete |
| - | no image | Ecuador | 9/3/1976 | empty sheet (#20741) | incomplete |
| - | no image | Ecuador | 10/1/1976 | empty sheet (#20742) | incomplete |
| - | no image | Ecuador | 11/12/1976 | empty sheet (#20743) | incomplete |
| - | no image | Ecuador | 11/25/1976 | empty sheet (#20744) | incomplete |