Name Country From To Pote Sarasin Thailand 5 September 1957 22 September 1958 William Worth (acting) Australia 22 September 1957 10 January 1958 Pote Sarasin Thailand 10 January 1958 13 December 1963 William Worth (acting) Australia 13 December 1963 19 February 1964 Konthi Suphamongkhon [de] Thailand 19 February 1964 1 July 1965 Jesus M. Vargas Philippines 1 July 1965 5 September 1972 Sunthorn Hongladarom [th; de] Thailand 5 September 1972 30 June 1977