Ключевые слова: aged, antique, boy, boy swimming, canceled, child, collection, commemorative, communication, correspondence, dutch, healthy, hobby, holland, isolated, issue, kid, letter, macro, mail, natation, netherlands, office, old, paper, perforated, philately, post, postage, postal, postmark, recreation, retro, service, shipping, sport, stamp, swim, swimming, used, vintage, water,