| Issuer | Date | Desc | State | ||
| - | |
Liberia | 3/4/1981 | empty sheet (#34256) | incomplete |
| - | |
Liberia | 7/4/1981 | empty sheet (#34257) | incomplete |
| - | no image | Liberia | 8/12/1981 | empty sheet (#34258) | incomplete |
| - | |
Liberia | 11/26/1981 | empty sheet (#34259) | incomplete |