USSR
Stamp from Souvenir sheet
| Country: | USSR |
| Type: | Postage stamps |
| Series: | Cosmonautics Day, 1973 |
| Nominal: | 20 k |
| Year: | 1973 |
| Material: | Chalk surfaced |
| Size: | 55 x 26 mm |
| Perforation: | frame 12 x 11½ |
Cosmonautics Day, 1973
