| Issuer | Date | Desc | State | ||
| - | no image | Niger | 3/30/1981 | empty sheet (#35665) | incomplete |
| - | no image | Niger | 7/15/1981 | empty sheet (#35666) | incomplete |
| - | no image | Niger | 11/11/1981 | empty sheet (#35667) | incomplete |
| - | no image | Niger | 11/30/1981 | empty sheet (#35668) | incomplete |