Air Mail cover 1933 (4 May) 1st. South America Flight envelope from Budapest to Brazil (9.5 arrival) bearing 1927 Air 1p., 2p. and regular 6f., and additionally bearing Germany Zeppelin 1m. carmine and Air 50pf., tied by "BERLIN C" c.d.s. (same day), showing special Zeppelin flight cachets in red and blue adjacent. Rare. Photo