Ключевые слова: astronaut, cancel, cancelled, cccp, collect, collectible, collection, colorful, colors, communication, communism, cosmos, cosmosnaut, exotic, games, historic, international, letter, mail, mark, obsolete, old, philatelic, philately, post, postage, postmark, regime, retro, russia, send, soviet, sport, stamp, union, usrr, wostok,