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Zeppelin Flight July 25-27, 1931, Zeppelin North Pole Flight registered postcard and cover, franked altogether by ice-breaker "Malygin" imperforated complete set of four, cancelled with Leningrad special marking, red and violet flight cachet, ice-breaker "27.VII.31" drop ds, mostly VF, Sieger #120Ba, Bb
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| Scott # C26-29