1970 Revenue Stamps – Overprinted “1970 POSTAL” and Surcharged 1971 Airmail – Quito Religious Art 1971 Visit of President Allende of Chile 1971 Airmail – Visit of President Allende of Chile 1971 Airmail – Opening of Postal Museum, Quito 1971 The 50th Anniversary of “El Universo” 1971 Airmail – The 50th Anniversary of “El Universo” 1971 Airmail – Pan-American Road Conference, Quito 1971 The 25th Anniversary of C.A.R.E. Organization 1972 State Visit of President Lanusse of Argentine Republic 1972 Airmail – State Visit of President Lanusse of Argentine Republic 1972 Religious Paintings of 18th-century Quito School 1972 Airmail – Religious Paintings of 18th-century Quito School