Six Kniga commemorative covers, each one issued and cancelled to mark one of the first six Russian manned space missions, each signed by the cosmonaut who flew that mission. Signers are: Yuri Gagarin, Gherman Titov, Andrian Nikolayev, Pavel Popovich, Valery Bykovsky, and Valentina Tereshkova. In fine condition. An impressive collection honoring Russia’s first group of cosmonauts. Pre-certified Scott Cornish and RRAuction COA.
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