Italian army postal service Upper Silesia 5 Pfg green, 10 Pfg red orange postage stamps issue ironworks and peace pigeon 1920 on picture postcard (s / w) CTO ZKr COSEL 12.5.1920 (053.5), furthermore formation stamp violet ZKr Comando Gruppo Spec (iale) Artiglieria there camp (o) / A (lta) S (ilesia) ( = command the field artillery Spezialgruppe Upper Silesia, OS handbook number IFf), picture postcards topic: Cosel - the Kirchstrasse, good condition