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July 25-27, 1931, Zeppelin North Pole Flight registered cover from Leningrad, franked by perforated Ice-Breaker "Malygin" complete set of four, appropriate flight cachet, ice-breaker "27.VII.31"dropped ds, arrival marking is alongside, VF, J. Simon certificate, Sieger #120Ca, ?1,300
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| Scott # C30-33