El Salvador
1968 Human Rights Year - Issues of 1965 Overprinted "1968 ANO INTERNACIONAL DE LOS DERECHOS HUMANOS"
1968 Airmail - Human Rights Year - Issues of 1965 Overprinted "1968 ANO INTERNACIONAL DE LOS DERECHOS HUMANOS"
1969 The 50th Anniversary of I.L.O
1969 Airmail - The 50th Aniiversary of I.L.O