Ключевые слова: art, black, capital, card, celebrity, collection, communication, correspondence, country, date, delivery, democratic, deutsche, economist, engels, europe, global, history, illustration, known, letters, macro, mail, mark, message, micro, national, object, old, overprint, paper, payment, perforated, perforation, philately, philosopher, picture, portrait, post, postage, postal, postcard, postmark, print, retro, romania, send, service, stamp, symbol, used, ussr,