HP300: UPU - Cambodia - 1970: 45k
HP301: Cambodia - 1970: 30k
HP302: Cambodia - 1970: 30k
HP303: Cambodia - 1957: 65k
HP304: Cambodia - 1995: 50k
HP305: Cambodia - 1969: 180k
HP306: Lào - 1973: 35k
HP307: Lào - 1963: 70k
HP308: Annam and Tonkin - 1888: 600k