USSR
| Country: | USSR |
| Type: | Postage stamps |
| Series: | “Soyuz T-4”–“Salyut 6” Space Complex |
| Nominal: | 10 k |
| Year: | 1981 |
| Size: | 32.5 x 32.5 mm |
| Perforation: | comb 11¾ |
| Mintage: | 4,500,000 |
“Soyuz T-4”–“Salyut 6” Space Complex
 Microscope slide, crystal and text |  Cosmonauts V.V. Kovalenok and V.P. Savinykh |