1928 (4 Aug.) cover (address partially excised) registered from Ulan Bator to Kharbin bearing 1926 20m., 1926-27 5m., 10m., 25m., 40m. and 50m., all tied by c.d.s. and with violet framed registration h.s. adjacent, reverse showing Chinese Postage Due 4c. (2) and 20c. block of four cancelled by "HARBIN" bilingual c.d.s.

细节
1928 (4 Aug.) cover (address partially excised) registered from Ulan Bator to Kharbin bearing 1926 20m., 1926-27 5m., 10m., 25m., 40m. and 50m., all tied by c.d.s. and with violet framed registration h.s. adjacent, reverse showing Chinese Postage Due 4c. (2) and 20c. block of four cancelled by "HARBIN" bilingual c.d.s.