| Added by |
 Maciej Pasztor
|
| General Description : | Karol Libelt (8 April 1807, Poznań, Grand Duchy of Posen, Kingdom of Prussia, German Confederation - 9 June 1875, Brdów) was a Polish philosopher, writer, political and social activist, social worker and liberal, nationalist politician, president of the PTPN. |
| Face value | 60 groszy |
| Catalog code (Michel) | PL 1033 |
| Catalog code (Scott) | PL 791 |
| Catalog code | Yvert et Tellier PL 916 Stanley Gibbons PL 1033 AFA number PL 923 Polish Stamps Catalog (Fischer) PL 888 |
| Series | The 100th anniversary of the foundation of the society for science in Poznań |
| Stamp colour | Carmine lake |
| Stamp use | Commemorative stamp |
| Print run | 5,410,000 |
| Issue date | 15/11/1957 |
| Designer | Jozef Skoracki |
| Paper type | White; Middel Smooth |
| Print technique | Photogravure |
| Printed by | PWPW (Państwowa Wytwórnia Papierów Wartościowych) |
| Perforation | 12½ x 12¾ (comb) |
| Height | 27.00 mm |
| Width | 21.00 mm |
| Catalog prices | No catalog prices set yet |
