| Issuer | Date | Desc | State | ||
| - | no image | Bhutan | 1/28/1991 | empty sheet (#50875) | incomplete |
| - | no image | Bhutan | 1/28/1991 | empty sheet (#50876) | incomplete |
| - | no image | Bhutan | 1/28/1991 | empty sheet (#50877) | incomplete |
| - | no image | Bhutan | 1/28/1991 | empty sheet (#50878) | incomplete |
| - | no image | Bhutan | 1/28/1991 | empty sheet (#50879) | incomplete |
| - | no image | Bhutan | 1/28/1991 | empty sheet (#50880) | incomplete |
| - | no image | Bhutan | 1/28/1991 | empty sheet (#50881) | incomplete |
| - | no image | Bhutan | 1/28/1991 | empty sheet (#50882) | incomplete |
| - | no image | Bhutan | 1/28/1991 | empty sheet (#50883) | incomplete |
| - | no image | Bhutan | 1/28/1991 | empty sheet (#50884) | incomplete |
| - | no image | Bhutan | 1/28/1991 | empty sheet (#50885) | incomplete |
| - | no image | Bhutan | 1/28/1991 | empty sheet (#50886) | incomplete |
| - | no image | Bhutan | 1/28/1991 | empty sheet (#50887) | incomplete |
| - | no image | Bhutan | 1/28/1991 | empty sheet (#50888) | incomplete |
| - | no image | Bhutan | 2/20/1991 | empty sheet (#50889) | incomplete |
| - | no image | Bhutan | 2/20/1991 | empty sheet (#50890) | incomplete |
| - | no image | Bhutan | 2/20/1991 | empty sheet (#50891) | incomplete |
| - | no image | Bhutan | 2/20/1991 | empty sheet (#50892) | incomplete |
| - | no image | Bhutan | 2/20/1991 | empty sheet (#50893) | incomplete |
| - | no image | Bhutan | 2/20/1991 | empty sheet (#50894) | incomplete |
| - | no image | Bhutan | 2/20/1991 | empty sheet (#50895) | incomplete |
| - | no image | Bhutan | 2/20/1991 | empty sheet (#50896) | incomplete |
| - | no image | Bhutan | 2/20/1991 | empty sheet (#50897) | incomplete |
| - | no image | Bhutan | 2/20/1991 | empty sheet (#50898) | incomplete |
| - | no image | Bhutan | 2/20/1991 | empty sheet (#50899) | incomplete |
| - | no image | Bhutan | 2/20/1991 | empty sheet (#50900) | incomplete |
| - | no image | Bhutan | 7/22/1991 | empty sheet (#50901) | incomplete |
| - | no image | Bhutan | 7/22/1991 | empty sheet (#50902) | incomplete |
| - | no image | Bhutan | 7/22/1991 | empty sheet (#50903) | incomplete |
| - | no image | Bhutan | 7/22/1991 | empty sheet (#50904) | incomplete |
| - | no image | Bhutan | 7/22/1991 | empty sheet (#50905) | incomplete |
| - | no image | Bhutan | 7/22/1991 | empty sheet (#50906) | incomplete |
| - | no image | Bhutan | 7/22/1991 | empty sheet (#50907) | incomplete |
| - | no image | Bhutan | 7/22/1991 | empty sheet (#50908) | incomplete |
| - | no image | Bhutan | 7/22/1991 | empty sheet (#50909) | incomplete |
| - | no image | Bhutan | 7/22/1991 | empty sheet (#50910) | incomplete |
| - | no image | Bhutan | 7/22/1991 | empty sheet (#50911) | incomplete |
| - | no image | Bhutan | 7/22/1991 | empty sheet (#50912) | incomplete |
| - | no image | Bhutan | 8/1/1991 | empty sheet (#50913) | incomplete |
| - | no image | Bhutan | 8/1/1991 | empty sheet (#50914) | incomplete |
| - | no image | Bhutan | 8/1/1991 | empty sheet (#50915) | incomplete |
| - | no image | Bhutan | 8/1/1991 | empty sheet (#50916) | incomplete |
| - | no image | Bhutan | 8/1/1991 | empty sheet (#50917) | incomplete |
| - | no image | Bhutan | 8/1/1991 | empty sheet (#50918) | incomplete |