Vanchenkov, Ivanchenkov, Bykovsky & Sigmund Jähn- Signed Russian Space Cover

Description

Russian space cover signed in various felt tip inks by Soyuz 29 cosmonauts Aleksandr Ivanchenkov, Vladimir Kovaryonak, Valery Bykovsky, and Sigmund Jähn. In very good condition.
Soyuz 29 was a 1978 crewed Soviet space mission to the Salyut 6 space station. It was the fifth mission, the fourth successful docking, and the second long-duration crew for the orbiting station.
Commander Vladimir Kovalyonok and flight engineer Aleksandr Ivanchenkov established a new space endurance record of 139 days. The crew returned in Soyuz 31, which had been swapped by a crew launched in August who returned in Soyuz 29.
Aleksandr Ivanchenkov is a retired Soviet cosmonaut who flew as Flight Engineer on Soyuz 29 and Soyuz T-6, he spent 147 days, 12 hours and 37 minutes in space.
(1934-2019) Valery Bykovsky was a Soviet cosmonaut who flew on three space flights: Vostok 5, Soyuz 22, and Soyuz 31. He was also backup for Vostok 3 and Soyuz 37.
(1937-2019) Sigmund Jähn was a German cosmonaut and pilot who in 1978 became the first German to fly into space as part of the Soviet Union's Interkosmos programme.
Comes with a full Letter of Authenticity from Todd Mueller Authentics if the item sells for or more.