To publicize the 1968 PRAGA International Stamp Exhibition, Czechoslovakia issued on October 30, 1967 a set of engraved stamps show previous stamp exhibition sites held in years 1962-1967. The stamps were designed by Jaroslav Lukavsky and engraved by Ladislav Jirka and Josef Hercik. Each stamp has tab with inscription "World Stamp Exhibition" in Czech and in the local language of the place depicted on the stamp.
Prague Castle - PRAGA'62, Prague, Czechoslovakia
Hagia Sophia - ISTANBUL'63, Istanbul, Turkey

Notre Dame - PHILATEC'64, Paris, France
Belvedere Palace - WIPA'65, Vienna, Austria

Capitol - SIPEX'66, Washington, USA
Amsterdam - AMPHILEX'67, Amsterdam, The Netherland
