1960s a group of 4 PLA military covers to/ from Yunnan, reflecting Chinese suppor to Vietnam during Vietnam War.
1960s a group of 4 PLA military covers to/ from Yunnan, reflecting Chinese suppor to Vietnam during Vietnam War.1960年代一組四件往來雲南之解放軍軍郵 封，反映了中國於越戰中支援越南。
