Proof 1973-75 Commemoratives, imperforate proofs (67) on De La Rue cards (27), consisting of 1973 Meteorological Day, Five Year Plan (no 10p.), Interpol, World Telecommunications Day, National Development, Buffalo, Human Rights, W.H.O., 1974 Sampan Women, Allies, Trung Sisters, Farmers Day, King Hung Vuong, National Library Building (including unissued 5p.), National Aid Day, Tourism, Orchids, Centenary U.P.U., Historical Sites (including unissued 100p.), 1975 New Year, "Hat Bo" and Farmers Day; some with instructions for values to be changed; a wonderful lot