| Added by |
 Maciej Pasztor
|
| Face value | 40 groszy |
| Catalog code (Michel) | 990 |
| Catalog code (Scott) | 746 |
| Catalog code | Polish Stamps Catalog 837 |
| Series | Intl.Museum Week,(UNESCO) |
| Place in series | 1 |
| Stamp colour | Dark green |
| Stamp use | Commemorative stamp |
| Print run | 743,000 |
| Issue date | 23/10/1956 |
| Designer | Czesław Kaczmarczyk Grav: Edward Konecki |
| Paper type | White; Middel Smooth |
| Print technique | Steel engraving |
| Printed by | PWPW (Państwowa Wytwórnia Papierów Wartościowych) |
| Perforation | 11¼ x 11 (harrow) |
| Height | 47.30 mm |
| Width | 35.50 mm |
| Catalog prices | No catalog prices set yet |
