Argentina 1930, Europe-Pan American Flight cover, franked with 12c San Martin in combination w...

Argentina
1930, Europe-Pan American Flight cover,
franked with 12c San Martin in combination with 20c ultramarine, 50c slate, 1p blue/red, 1.8p blue/lilac red, and 3.60p slate/blue "Zeppelin / 1er Vuelo 1930" overprints, tied to over by Buenos Aires (21 May) c.d.s., violet handstamped USA "Europe - Pan America / Round Flight" confirmation cachet, Friedrichshafen (Jun 6) and Berlin (Jun 7) backstamps, a scarce set of five on cover, striking and fine.
Cover