Sheets of El Salvador, 1990
| Issuer | Date | Desc | State | ||
| - | no image | El Salvador | 3/30/1990 | empty sheet (#22767) | incomplete |
| - | no image | El Salvador | 7/30/1990 | empty sheet (#22768) | incomplete |
| - | no image | El Salvador | 7/30/1990 | 500th Anniversary of Discovery of America (in 1992), sheet of 1 type | |
| - |  |
El Salvador | 10/5/1990 | empty sheet (#22770) | incomplete |
| - |  |
El Salvador | 11/28/1990 | empty sheet (#22771) | incomplete |