The signatures transform the cover from a flown postal artifact into a highly significant record of international human spaceflight during the final years of the Mir era

but the spacewalk was cancelled before they left the station

Expedition 1 “First Space Mail” — Historic Letter Written Aboard the ISS and Returned by STS-98 Atlantis

Anton Schkaplerow und Scott Tingle

Very few astrophilatelic artifacts can document two separate journeys into orbit

Liwei Yang - first Chinese taikonaut MPO launch cover Ken Mattingly The signatures transform the coverLiwei Yang first Chinese taikonaut hand signed military post office launch cover 15. 10. 2003. RARELY seen these days !