Ключевые слова: background, black, burundi, celebrity, collectible, collection, collector, communication, correspondence, country, date, delivery, europe, history, illustration, known, kremlin, lenin, mail, mark, memorial, message, micro, national, old, overprint, paper, payment, perforated, perforation, philatelic, philately, philosopher, philosophy, picture, portrait, post, postage, postal, postmark, print, republic, send, service, stamp, symbol, used, vintage,