| Issuer | Date | Desc | State | ||
| - | no image | Nigeria | 1/24/1992 | empty sheet (#21312) | incomplete |
| - | no image | Nigeria | 4/3/1992 | empty sheet (#21313) | incomplete |
| - | no image | Nigeria | 7/3/1992 | empty sheet (#21314) | incomplete |
| - | no image | Nigeria | 7/17/1992 | empty sheet (#21315) | incomplete |
| - | no image | Nigeria | 12/1/1992 | empty sheet (#21316) | incomplete |
| - | no image | Nigeria | 12/15/1992 | empty sheet (#21317) | incomplete |