moPiUloBpTk0pcOsiAmZZPgPoland 1938 Stratisphere

This attractive sheet was issued to celebrate the proposed stratosphere balloon flight by Poland.
Released September 15, 1938, it was designed by L. Sowinski and engraved by W. Vacek.Sheet 75 x 125 mm. Perff. 12 1/2 by 12.