| Issuer | Date | Desc | State | ||
| - | no image | Nicaragua | 1/15/1991 | empty sheet (#86030) | incomplete |
| - | no image | Nicaragua | 2/1/1991 | empty sheet (#86031) | incomplete |
| - | no image | Nicaragua | 2/1/1991 | empty sheet (#86032) | incomplete |
| - | no image | Nicaragua | 3/21/1991 | empty sheet (#86033) | incomplete |
| - | no image | Nicaragua | 4/21/1991 | empty sheet (#86034) | incomplete |
| - | no image | Nicaragua | 4/21/1991 | empty sheet (#86035) | incomplete |
| - | no image | Nicaragua | 5/21/1991 | empty sheet (#28056) | incomplete |
| - | no image | Nicaragua | 8/15/1991 | empty sheet (#86036) | incomplete |
| - | no image | Nicaragua | 11/1/1991 | empty sheet (#86037) | incomplete |