| Issuer | Date | Desc | State | ||
| - | no image | Comoro Islands | 3/23/1992 | empty sheet (#43551) | incomplete |
| - | no image | Comoro Islands | 3/30/1992 | empty sheet (#43552) | incomplete |
| - | no image | Comoro Islands | 5/28/1992 | empty sheet (#43553) | incomplete |
| - | no image | Comoro Islands | 7/28/1992 | empty sheet (#43554) | incomplete |