Sheets of El Salvador, 1964
| Issuer | Date | Desc | State | ||
| - |  |
El Salvador | 4/16/1964 | empty sheet (#22737) | incomplete |
| - |  |
El Salvador | 4/16/1964 | empty sheet (#22738) | incomplete |
| - |  |
El Salvador | 11/22/1964 | empty sheet (#22739) | incomplete |
| - |  |
El Salvador | 11/22/1964 | empty sheet (#22740) | incomplete |