| Added by |
 Maciej Pasztor
|
| Face value | 20 Marka on 50 Heller |
| Catalog code (Michel) | Porto 35 |
| Catalog code (Scott) | POSTAGE DUE J38 |
| Catalog code | Polish Stamps Catalog D35 (Znaczki dopłaty) |
| Series | Regular Issue of 1919 Surcharged |
| Place in series | 4 |
| Stamp colour | Indigo overprint back |
| Stamp use | Postage Due stamp |
| Print run | 60,000 |
| Issue date | 25/01/1921 |
| Designer | J.Michalski |
| Paper type | Wove |
| Print technique | Lithography overprint typography |
| Printed by | Drukarnia Zielińskiego Kraków |
| Perforation | imper. |
| Height | 26.00 mm |
| Width | 22.00 mm |
| Catalog prices | No catalog prices set yet |
