MILITARY MAIL GROUP; Quartet with June 1910 plain PC/unfranked env. to Japan from the Ranan Garrison or Kimhwa in N.Korea with "Military Mail/2nd Cavalry Regiment" or "65th Infantry/Military Mail" red-orange rectangular h.s. on front and 1918 censored envs. to The Hague franked 10s or 10s (2) + 5s with a Shimonsekihosoe reg. label on front, possibly from Dutch military personnel under the Inter-allied Railway agreement. (4 items) Cross Reference: JAPAN, KOREA, REGISTERED MAIL (Image)