Ключевые слова: abstract, africa, african, aged, agreement, approval, canceled, cancelled, collect, collection, country, delivery, drop, droplet, exhibition, flower, history, hobby, isolated, letter, macro, mail, mark, message, national, object, old, over, overprint, paper, perforated, perforation, philatelic, philately, plant, post, postage, postal, postmark, print, republic, rsa, service, south, stamp, symbol, unique, used, vintage, water,