Stamps, Lyakhov and Ryumin's 175 Days in Space. issue
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Russia
postage1979, Oct 10 Lyakhov and Ryumin's 175 Days in Space. issue unwmk
| - | 15k | multi | Vladimir Lyakhov & Valery Ryumin, p. 12x11.5 | — | — | |
| - | 15k | multi | radio telescope mounted on Salyut 6, p. 12x11.5 | — | — | |
| - | 30k | multi | Vladimir Lyakhov & Valery Ryumin & Salyut 6 | — | — |
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