Wikimedi'Òc

USSR 1932-01-06 registered cover Moscow-Munich.jpg - Arno-nl

USSR 1932-08-26 Polar expedition cover.jpg - Arno-nl

USSR 1932-01-06 registered cover Moscow-Munich reverse.jpg - Arno-nl

USSR 1932-02-08 registered express cover Leningrad-Nuremberg.jpg - Arno-nl

USSR 1932-08-28 metered cover B1 francotype C.jpg - Arno-nl