This envelope was on board the International Space Station.
The cover was marked with the “ISS” octagonal board seal, the “Russian Post. ISS. Russian Segment” round board post mark and the “Russian Segment of International Space Station” board souvenir seal both dated 27 July 2019, the day when the US “Dragon CRS-18” unmanned supply spacecraft docked to the ISS. The cover was autographed by all 6 cosmonauts/astronauts who were aboard the station on that day: Italian astronaut Luca Parmitano; Russian cosmonauts Aleksey Ovchinin and Aleksandr Skvortsov; American astronauts Tyler «Nick» Hague, Christina Koch and Andrew Morgan. It is necessary to remark that the cover was not carried by the "Dragon" spacecraft. The cover was delivered to the ISS and then back to Earth by a Russian cosmonaut aboard a Soyuz MS spacecraft.