1931, Polar travel, handing in for transport Friedrichshafen to Leningrad, letter with 2 RM. Polar travel from "FRIEDRICHSHAFEN 24.7.31" to Göttingen with arrival postmark Leningrad from 25. July and appropriate Cachet, stamp with a minimal shortened tooth left and on face slight affixed spots, fine example (former starting price 140) ;