Soyuz T-15 – Salyut + MIR historic transfer mission - crewsigned cover

Soyuz T-15 Crew-Signed Baikonur Cover – The Only Mission to Travel Between Two Space Stations

A very rare Baikonur postal cover dated July 16, 1986, the day of the successful return of Soyuz T-15, hand-signed by the complete two-man crew: Commander Leonid Kizim and Flight Engineer Vladimir Solovyov.

Soyuz T-15 occupies a unique place in the history of human spaceflight. Launched on March 13, 1986, Kizim and Solovyov became the first resident crew of the newly launched Mir space station. After 51 days aboard Mir, they undocked on May 5 and flew approximately 6,000 kilometers across orbit to the older Salyut 7 station, arriving the following day. There they conducted experiments, performed two spacewalks, and recovered valuable equipment before returning to Mir in late June. NASA records this as the first and, to date, only crewed station-to-station transfer in spaceflight history.

The mission was historically significant as the symbolic and operational bridge between two generations of Soviet orbital stations: Salyut 7, the culmination of the Salyut program, and Mir, the modular station that would define long-duration spaceflight for the following fifteen years. Soyuz T-15 was also the final mission of the Soyuz-T series.

The present cover, bearing the date **July 16, 1986—the day Kizim and Solovyov returned to Earth after 125 days in space—**provides a particularly fitting philatelic record of this extraordinary mission.

Mission: Soyuz T-15
Crew: Leonid Kizim and Vladimir Solovyov
Stations visited: Mir and Salyut 7
Date: July 16, 1986
Signatures: Complete two-man crew
Historical distinction: The only crew in history to travel between two separate space stations during the same mission

An exceptionally scarce and historically important signed artifact documenting one of the most remarkable feats of orbital navigation and the transition from the Salyut era to the age of Mir.