This registered letter was sent from the “Taipei-2016” World Philatelic exhibition to Moscow, Russia.
Then the letter was delivered to the International Space Station by the Russian supply spacecraft. To document the delivery, on board the station the letter was marked with all proper board seals including the Russian official “Russian Post. ISS. Russian Segment” round board post mark dated February 24, 2017, the day when the “Progress MS-05” unmanned supply spacecraft docked with the ISS.