| Issuer | Date | Desc | State | ||
| - | no image | Nicaragua | 1988 | empty sheet (#86004) | incomplete |
| - | no image | Nicaragua | 1/30/1988 | empty sheet (#86011) | incomplete |
| - | no image | Nicaragua | 2/28/1988 | empty sheet (#86012) | incomplete |
| - | no image | Nicaragua | 3/3/1988 | empty sheet (#86013) | incomplete |
| - | no image | Nicaragua | 4/14/1988 | empty sheet (#86009) | incomplete |
| - | no image | Nicaragua | 6/1/1988 | empty sheet (#86010) | incomplete |