Ключевые слова: 100, 2007, antique, art, circa, commemoration, correspondence, denmark, design, envelope, famous, hand, hands, heritage, historic, hobby, isolated, issue, letter, mail, metric, metric system, national, old, philatelic, philately, portrait, post, postage, postage stamp, postage stamp image, postal, postmark, scale, series, stamp, system, vintage, year,