French army postal service Upper Silesia 10 Pfg dark red orange postage stamps issue drawing numbers 1920, 30 Pfg yellowish orange, 1 Mark rose lilac postage stamps issue ironworks and peace pigeon 1920 on cover from Opole to St. Louis (Dep. Skin Rhin), sender was a ziviler member the Interalliierten mission for Upper Silesia, ZKr Opole 20.6.1920 (237.9), date-appropriate traces of age and usage