| Issuer | Date | Desc | State | ||
| - | no image | Chad | 1973 | empty sheet (#51272) | incomplete |
| - | no image | Chad | 1973 | empty sheet (#51273) | incomplete |
| - | no image | Chad | 1973 | empty sheet (#51274) | incomplete |
| - | no image | Chad | 1973 | empty sheet (#51275) | incomplete |
| - | no image | Chad | 1/17/1973 | empty sheet (#51271) | incomplete |