Gliwice 6.4.1921 ZKr (089.26) on cover with multiple franking 30 Pfg yellow orange horizontal pair postage stamps issue smelting works and peace pigeon to Bogutschuetz, stamps with perfin (perfin) "O. E. W. " about 45 ? left turned inverted (O. E. W. = Upper Silesian electricity works, Gliwice, OS handbook number 12), tears at the upper margin of the cover, the stamps even are intact