Since my family was from this area, the stamp caught my eye. The city
in the background is Dubrovnik (Croatia), situated on the coast of the
Adriatic sea. The "glider" that was identified as a Zlin Z-22 appears
to be a float plane, at rest in the water off the city. Searching the
internet, the only reference I found to a Zline Z-22 was a smal Czech-
built powered trainer built in 1946. Wing span 35 ft, takeoff weight
1279 lbs, 53 hp, wing loading of 8.2 lbs/sq ft. This sounds like a
light sport aircraft, not a glider.

Does anyone have more information, or is the Soaring magazine just
wrong?