| Issuer | Date | Desc | State | ||
| - | no image | Bhutan | 2/1/2001 | empty sheet (#51093) | incomplete |
| - | no image | Bhutan | 2/1/2001 | empty sheet (#51094) | incomplete |
| - | no image | Bhutan | 3/1/2001 | empty sheet (#51095) | incomplete |
| - | no image | Bhutan | 9/23/2001 | empty sheet (#51096) | incomplete |
| - | no image | Bhutan | 12/17/2001 | empty sheet (#51097) | incomplete |