| Added by |
 Maciej Pasztor
|
| Face value | 20 złotych |
| Catalog code (Michel) | Porto 117 |
| Catalog code (Scott) | POSTAGE DUE J119 |
| Catalog code | Polish Stamps Catalog D121 (Znaczki dopłaty) |
| Series | Polish Eagle |
| Place in series | 4 |
| Stamp colour | Red brown |
| Stamp use | Postage Due stamp |
| Print run | 4,356,00 |
| Issue date | 20/10/1950 |
| Designer | Ryszard Kleczewski; Grav: Stanisław Łukaszewski |
| Paper type | White; middel, smooth |
| Print technique | Steel engraving |
| Printed by | PWPW (Państwowa Wytwórnia Papierów Wartościowych) |
| Perforation | 12 x 12½ (harrow) |
| Height | 31.30 mm |
| Width | 17.20 mm |
| Catalog prices | No catalog prices set yet |
