Poland
The stamp exists also with the watermark "Posthorn Type 2 Multiple [Rev, Inv] - III-3"
| Country: | Poland |
| Type: | Postage stamps |
| Series: | Scientists |
| Nominal: | 2.50 zł |
| Year: | 1959 |
| Size: | 28 x 41 mm |
| Perforation: | comb 11 x 11¼ |
| Mintage: | 544,000 |
Scientists
 Charles Robert Darwin 0.06$ |  Dimitrij Iwanowitsch Mendelejev 0.15$ |  Albert Einstein 0.07$ |  Louis Pasteur 0.18$ |
 Isaac Newton 0.12$ |  Mikolaj Kopernik |