| Added by |
 Maciej Pasztor
|
| Face value | 1,50 złotego |
| Catalog code (Michel) | 1112 |
| Catalog code (Scott) | 860 |
| Catalog code | Polish Stamps Catalog 968 |
| Series | Esperanto Congress in Warsaw (Centenary of the birth of L.L. Zamenhof) |
| Place in series | 2 |
| Stamp colour | Ultramarine, green, red and gray |
| Watermark | III 1;5;7 |
| Stamp use | Commemorative stamp |
| Print run | 385,000 |
| Issue date | 24/07/1959 |
| Designer | Ryszard Dudzicki |
| Paper type | White; middel, smooth (one side colored) |
| Print technique | Offset |
| Printed by | PWPW (Państwowa Wytwórnia Papierów Wartościowych) |
| Perforation | 12½ x 12½ (comb) |
| Height | 26.50 mm |
| Width | 20.50 mm |
| Catalog prices | No catalog prices set yet |
