Sheets of Poland, 1978
| Issuer | Date | Desc | State | ||
| - |  |
Poland | 6/6/1978 | Capex '78, sheet of 1 type | |
| - |  |
Poland | 6/27/1978 | 1st Polish cosmonaut, sheet of 1 type | all added |
| - |  |
Poland | 6/27/1978 | 1st Polish cosmonaut, sheet of 1 type | all added |
| - |  |
Poland | 7/20/1978 | Polish Youth Movement 30th, sheet of 1 type | all added |
| - |  |
Poland | 9/8/1978 | PRAGA '78, sheet of 1 type | all added |