| Issuer | Date | Desc | State | ||
| - | no image | Republic ..the Congo | 2/1/1970 | empty sheet (#50083) | incomplete |
| - | no image | Republic ..the Congo | 2/1/1970 | empty sheet (#50084) | incomplete |
| - | no image | Republic ..the Congo | 6/20/1970 | empty sheet (#50085) | incomplete |
| - | no image | Republic ..the Congo | 12/10/1970 | empty sheet (#50086) | incomplete |