1969 Soviet cover commemorating historic First space docking "16 January, 1969 World's First Experimental Space Station", signed by all crew members Soyuz-4/Spyuz-5:Shatalov,Volynov, Yeliseyev, Khrunov.
Cover taken on spaceflight by Soyuz MS-18 commander Oleg Novitskiy.
Stamped with octagonal hand stamp "Board of ISS".Signed by Oleg Novitskiy on board as well.
Cover spent on orbit 190 days during ISS-65 Expedition.