| Issuer | Date | Desc | State | ||
| - | no image | Bhutan | 2008 | empty sheet (#51162) | incomplete |
| - | no image | Bhutan | 2008 | empty sheet (#51167) | incomplete |
| - | no image | Bhutan | 2/8/2008 | empty sheet (#51161) | incomplete |
| - | no image | Bhutan | 5/2/2008 | empty sheet (#51163) | incomplete |
| - | no image | Bhutan | 6/25/2008 | empty sheet (#51164) | incomplete |
| - | no image | Bhutan | 6/25/2008 | empty sheet (#51165) | incomplete |
| - | no image | Bhutan | 6/25/2008 | empty sheet (#51166) | incomplete |
| - | no image | Bhutan | 12/17/2008 | empty sheet (#51168) | incomplete |