Sheets of El Salvador, 1988
| Issuer | Date | Desc | State | ||
| - | no image | El Salvador | 8/31/1988 | empty sheet (#22757) | incomplete |
| - |  |
El Salvador | 8/31/1988 | empty sheet (#22758) | incomplete |
| - |  |
El Salvador | 12/21/1988 | empty sheet (#22759) | incomplete |
| - |  |
El Salvador | 12/21/1988 | empty sheet (#22760) | incomplete |