1931, Polar travel, handing in for transport Friedrichshafen to Malygin, cover with 4 RM. Polar travel with right lower corner of the sheet from "FRIEDRICHSHAFEN 24.7.31" to to be silent with arrival postmark from Malyguin from 27. July and appropriate Cachet, stamp slightly gum spots, otherwise well perforated and in perfect condition, expertized Goede