| Issuer | Date | Desc | State | ||
| - | no image | Bhutan | 7/24/1992 | empty sheet (#50919) | incomplete |
| - | no image | Bhutan | 9/18/1992 | empty sheet (#50920) | incomplete |
| - | no image | Bhutan | 10/3/1992 | empty sheet (#50921) | incomplete |
| - | no image | Bhutan | 12/17/1992 | empty sheet (#50922) | incomplete |