| Issuer | Date | Desc | State | ||
| - | no image | Bhutan | 2/3/2011 | empty sheet (#51189) | incomplete |
| - | no image | Bhutan | 5/28/2011 | empty sheet (#51190) | incomplete |
| - | no image | Bhutan | 8/15/2011 | empty sheet (#51191) | incomplete |
| - | no image | Bhutan | 8/15/2011 | empty sheet (#51192) | incomplete |
| - | no image | Bhutan | 10/13/2011 | empty sheet (#51193) | incomplete |
| - | no image | Bhutan | 10/13/2011 | empty sheet (#51194) | incomplete |
| - | no image | Bhutan | 10/13/2011 | empty sheet (#51195) | incomplete |
| - | no image | Bhutan | 10/13/2011 | empty sheet (#51196) | incomplete |
| - | no image | Bhutan | 10/13/2011 | empty sheet (#51197) | incomplete |
| - | no image | Bhutan | 10/13/2011 | empty sheet (#51198) | incomplete |
| - | no image | Bhutan | 11/1/2011 | empty sheet (#51199) | incomplete |
| - | no image | Bhutan | 11/1/2011 | empty sheet (#51200) | incomplete |