Italian army postal service Upper Silesia 1 Mark rose lilac vertical pair, 2 Mark dark brown postage stamps issue ironworks and peace pigeon 1920 on cover from Opole to Napoli, ZKr Opole 5.3.1922 (237.7), fragment of a arrival postmark ZKr reverse, the letter was, like the by far predominant part the correspondence of the Italian troop contingent in Upper Silesia, of the civil post of the plebiscite area transported, date-appropriate traces of age and usage