Info| Date | 1981, 05 IV |
|---|---|
| Value | 2x 6 Kčs |
| Catalog no. | Mi 2611, BL43 Sc 2356a SG MS2570 Y&T BF49 |
| Topic | Interkosmos Project |
| Occasion | 20th anniversary of the first manned space flight |
| Description | On the stamps: Yuri Gagarin, the first cosmonaut. On the sheet, in the bottom left corner: the Interkosmos logo and the flags of the countries, participating in this project. Among them the Polish flag. |
