South America

1978 Airmail – The 25th Anniversary of the Coronation of Queen Elizabeth II

1978 The 50th Anniversary of Lufthansa & Football World Cup – Argentina

1978 The 75th Anniversary of the Nobel Prizes

1978 International Stamp Exhibition “PHILASERDICA ’79” – Sofia, Bulgaria

1978 International Stamp Exhibition “PRAGA ’78” – Prague, Czeck Republic

1978 International Stamp Exhibition “CAPEX ’78” – Toronto, Canada

1978 International Stamp Exhibition “HONDURAS ’78” – Tegucigalpa, Honduras

1978 Postage Stamps

1978 The 50th Anniversary of the Audit Department

1977 National Stamp Exhibition “EXFIVIA 77”, Cochabamba