1978 The 200th Anniversary of the La Scala Opera House, Milan, and Carlos Gomes Commemoration
1978 The 200th Anniversary of the La Scala Opera House, Milan, and Carlos Gomes Commemoration
Brazil
1977 The 50th Anniversary of the Varig State Airline
1977 The 50th Anniversary of the Varig State Airline
1977 International Thematic Stamp Exhibition “Portucale 77” – Porto, Portugal – Gemstones
1977 International Thematic Stamp Exhibition “Portucale 77” – Porto, Portugal – Gemstones
1977 Day of the Book and Jose de Alencar Commemoration
1977 Day of the Book and Jose de Alencar Commemoration