Six KNIGA covers, all with cachets commemorating Russian space achievements, issued and canceled to mark one of the first six Russian manned space missions. Each signed in ink by one of the first six cosmonauts, including: Yuri Gagarin, German Titov, Andriyan Nikolayev, Pavel Popovich, Valery Bykovsky, and Valentina Tereshkova. In fine condition. Accompanied by documentation and a postcard (all in German) from the famed Apollo 15 cover dealer Hermann Sieger. Pre-certified Steve Zarelli.
Terms and abbreviations used in our descriptions.