| Issuer | Date | Desc | State | ||
| - | no image | Tonga | 1/24/1997 | empty sheet (#19872) | incomplete |
| - | no image | Tonga | 3/24/1997 | empty sheet (#19873) | incomplete |
| - | no image | Tonga | 3/24/1997 | empty sheet (#19874) | incomplete |
| - | no image | Tonga | 4/28/1997 | empty sheet (#19875) | incomplete |
| - | no image | Tonga | 5/30/1997 | empty sheet (#19876) | incomplete |
| - | no image | Tonga | 8/27/1997 | empty sheet (#19877) | incomplete |
| - | no image | Tonga | 9/8/1997 | empty sheet (#19878) | incomplete |