Erik Boeré Philatelie : Марки за продажба - Чехословакия
Сега показвам: Чехословакия - Пощенски разноски марки (1918 - 1992) - 2 марки.
1957
The 250th Anniversary of Polytechnic Engineering Schools, Prague
25. Май воден знак: Никой Пробиване: 11½
![[The 250th Anniversary of Polytechnic Engineering Schools, Prague, тип RC]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-stamps/RC-s.jpg)
1957
The 250th Anniversary of Polytechnic Engineering Schools, Prague
25. Май воден знак: Никой Пробиване: 11½
![[The 250th Anniversary of Polytechnic Engineering Schools, Prague, тип RC]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-stamps/RC-s.jpg)