Salyut 6, Soyuz 26 flown space cosmonaut mail cover.

The flown cover signed by Soyuz 26 crew members cosmonauts Yuri Romanenko ( blue pen) and Georgy Grechko ( green pen, signature very faded, scan could not take it), Size 18 cm x 10 cm.

Excellent condition.

Authenticity guaranteed, the buyer will receive the letter of authenticity.

Cosmonauts Biography:

Yuri Romanenko (1944-) is a former Soviet cosmonaut, twice Hero of the Soviet Union (March 16, 1978 and September 26, 1980). Over his career, Yuri Romanenko spent a total of 430 days 20 hours 21 minutes 30 seconds in space and 18 hours in space walks. In 1987, he was a resident of the Mir space station, launching on Soyuz TM-2 and landing aboard Soyuz TM-3. He remained on Mir for 326 days that was the longest stay in space at that time. His son, Roman Romanenko is also a cosmonaut, and has become the third second-generation space traveler on Soyuz TMA-15 in May 2009.

Georgy Grechko (1931-) is a retired Soviet cosmonaut who flew on several spaceflights among which Soyuz 17, Soyuz 26, and Soyuz T-14. Grechko graduated from the Leningrad Institute of Mechanics with a doctorate in mathematics. He was a member of Communist Party of Soviet Union. He went on to work at Sergei Korolev 's design bureau and from there was selected for cosmonaut training for the Soviet moon programme. When that program was cancelled, he went on to work on the Salyut space stations. Georgy Grechko made the first spacewalk in an Orlan space suit. This spacewalk was made on December 20, 1977 during the Salyut 6 EO-1 mission. He was awarded twice the medal of Hero of the Soviet Union. He resigned from the space program in 1992 to lecture in atmospheric physics at the Russian Academy of Sciences. A minor planet 3148 Grechko discovered by Soviet astronomer Nikolai Stepanovich Chernykh in 1979 is named after him. 

Grechko, along with Alexey Leonov, Vitaly Sevastyanov and Rusty Schweickart established the Association of Space Explorers in 1984. Membership is open to all people who have flown in outer space.