| Issuer | Date | Desc | State | ||
| - | no image | Burundi | 12/3/1975 | empty sheet (#43073) | incomplete |
| - | no image | Burundi | 12/3/1975 | empty sheet (#43074) | incomplete |
| - | no image | Burundi | 12/22/1975 | empty sheet (#43075) | incomplete |
| - | no image | Burundi | 12/22/1975 | empty sheet (#43076) | incomplete |