| Issuer | Date | Desc | State | ||
| - | no image | Ecuador | 1/17/1990 | empty sheet (#20813) | incomplete |
| - | no image | Ecuador | 7/12/1990 | empty sheet (#20814) | incomplete |
| - | no image | Ecuador | 7/12/1990 | empty sheet (#20815) | incomplete |
| - | no image | Ecuador | 9/1/1990 | empty sheet (#20816) | incomplete |
| - | no image | Ecuador | 9/7/1990 | empty sheet (#20817) | incomplete |
| - | no image | Ecuador | 11/2/1990 | empty sheet (#20818) | incomplete |