Ключевые слова: adult, aged, america, american, ancient, antique, canceled, card, child, children, communication, correspondence, envelope, historic, historical, history, image, job, known, labor, letter, mail, mark, message, national, old, paper, perforated, perforation, philatelist, philately, picture, post, postage, postal, postcard, postman, postmark, printed, reform, retro, seal, stamp, states, symbol, united, us, usa, vintage, young,