Sheets of Poland, 1991
| Issuer | Date | Desc | State | ||
| - |  |
Poland | 5/2/1991 | empty sheet (#8895) | incomplete |
| - |  |
Poland | 8/15/1991 | empty sheet (#8896) | incomplete |
| - |  |
Poland | 9/7/1991 | sheet of 4, 1 type | |
| - |  |
Poland | 11/16/1991 | sheet of 18, 6 types | all added |
| - |  |
Poland | 11/16/1991 | empty sheet (#8898) | incomplete |