Ключевые слова: 50, 1990, animal, antique, aquaticus, bird, canceled, circa, closeup, collection, correspondence, deliver, democratic, design, emblem, envelope, fauna, heritage, historic, hobby, issue, korea, letter, mail, national, nature, old, people, philatelic, philately, post, postage, postal, rail, rallus, republic, retro, series, stamp, vintage, water,