Sheets of Bulgaria, 1963
| Issuer | Date | Desc | State | ||
| - |  |
Bulgaria | 8/26/1963 | Joint Flight of Vostok 5 and Vostok 6, sheet of 1 type | |
| - |  |
Bulgaria | 9/13/1963 | Balkan Games 1963, empty sheet (#5892) | incomplete |
| Issuer | Date | Desc | State | ||
| - | |
Bulgaria | 8/26/1963 | Joint Flight of Vostok 5 and Vostok 6, sheet of 1 type | |
| - | |
Bulgaria | 9/13/1963 | Balkan Games 1963, empty sheet (#5892) | incomplete |