| Issuer | Date | Desc | State | ||
| - | no image | Burundi | 3/19/1973 | empty sheet (#43057) | incomplete |
| - | no image | Burundi | 4/10/1973 | empty sheet (#43058) | incomplete |
| - | no image | Burundi | 4/10/1973 | empty sheet (#43059) | incomplete |
| - | no image | Burundi | 11/19/1973 | empty sheet (#43060) | incomplete |
| - | no image | Burundi | 11/19/1973 | empty sheet (#43061) | incomplete |
| - | no image | Burundi | 12/14/1973 | empty sheet (#43062) | incomplete |
| - | no image | Burundi | 12/14/1973 | empty sheet (#43063) | incomplete |