| Issuer | Date | Desc | State | ||
| - | no image | Bhutan | 11/15/1978 | empty sheet (#50657) | incomplete |
| - | no image | Bhutan | 11/15/1978 | empty sheet (#50658) | incomplete |
| - | no image | Bhutan | 11/15/1978 | empty sheet (#50659) | incomplete |
| - | no image | Bhutan | 11/15/1978 | empty sheet (#50660) | incomplete |
| - | no image | Bhutan | 11/15/1978 | empty sheet (#50661) | incomplete |
| - | no image | Bhutan | 11/15/1978 | empty sheet (#50662) | incomplete |
| - | no image | Bhutan | 11/15/1978 | empty sheet (#50663) | incomplete |