Korea. (Chile). 1923. Registered and Advice of Receipt Chile postal stationery envelope upgraded with Yvert 97, 1p green and black tied by Rancagua/ Certif date stamp '14th Oct 23' with registration label and 'A.R.' label on face addressed to Genzun, Korea routed via Santiago and Keijo/ Chosen '22/12' in violet with Genzun vernacular arrival. Superb item of incoming mail.