Ключевые слова: advancement, aged, anthropologist, antique, biologist, canceled, carl, collection, commemorative, correspondence, ddr, doctor, east, editor, gdr, german, germany, health, hobby, isolated, issue, letter, macro, mail, male, man, office, old, paper, pathologist, perforated, philately, politician, post, postage, postal, postmark, public, public health, retro, rudolf, rudolf carl virchow, shipping, stamp, used, vintage, virchow, writer,