1975 Soviet Soyuz-Apollo cover flown aboard Soyuz MS-18 "Y.Gagarin" ship to the International Space Station.Signed on board by Soyuz MS-18 commander cosmonaut Oleg Novitskiy.Cancelled with octagonal hand stamp "Board of ISS".Flown April 9-October 17, 2021 Expeditions-64/65.
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