CZECHOSLOVAKIA
1976 Airmail - PRAGA 78 International Stamp Exhibition, Prague Architecture
1980 The 50th International Peace Marathon, Kosice
The 30th Anniversary of Young Pioneer Organization and International Year of the Child
1987 The 11th Biennial Exhibition of Book Illustrations for Children, Bratislava
Czechoslovakia 1977 - The 9th Trade Unions Congress
1988 Praga '88 International Stamp Exhibition - Present-day Prague
1987 The 30th Anniversary of Organization of Socialist Countries' Postal Administrations
1987 Stamp Day - The 105th Anniversary of the Birth of Jakub Obrovsky ,Stamp Designer
1989 The 12th Biennial Exhibition of Book Illustrations for Children
1989 The 50th Anniversary of International Students Day