Ключевые слова: 4, 1961, america, animal, antique, boss, cattle, circa, collection, conservation, correspondence, design, envelope, equestrianism, fauna, heritage, historic, hobby, horse, horse riding, issue, landscape, letter, mail, modern, national, old, people, philatelic, philately, post, postage, postage stamp image, postal, postmark, range, retro, stamp, trail, united states, usa, vintage,