| Added by |
 Maciej Pasztor
|
| Face value | 15 fenig |
| Catalog code (Michel) | Dieneste 4 |
| Catalog code (Scott) | OFFICIAL O4 |
| Catalog code | Polish Stamps Catalog U4 (Znaczki urzędowe) |
| Series | Numbers |
| Place in series | 4 |
| Stamp colour | Vermilion |
| Stamp use | Official stamp |
| Print run | 4,775,000 (with U14) |
| Issue date | 01/02/1920 |
| Designer | Edmund Ludwik Bartłomiejczyk |
| Paper type | White; Thick Smooth |
| Print technique | Typography |
| Printed by | Drukarnia Poczty i Telekomunikacji Warszawa |
| Perforation | 11½ or 10 x 11½ or 11½ x 10 (line) |
| Height | 16.50 mm |
| Width | 25.00 mm |
| Catalog prices | No catalog prices set yet |
