Poland
The stamp exists also with the watermark "Posthorn Type 2 Multiple [Rev, Inv] - III-3"
| Country: | Poland |
| Type: | Postage stamps |
| Series: | 15th anniv. PRL |
| Nominal: | 1.50 zł |
| Year: | 1959 |
| Size: | 22 x 26 mm |
| Perforation: | comb 12 x 12½ |
| Mintage: | 2,001,000 |
15th anniv. PRL
 Symbol of Agriculture 0.24$ |  Symbol of Industry 0.12$ |  Symbol of art. And science |