BEUTHEN 15.7.1920 ZKr (015.16) on cover with single franking 40 Pfg green olive postage stamps issue smelting works and peace pigeon to Limbourg on d. Lahn, stamp with perfin (perfin) "O. R. K" about 90 ? left turned (O. R. K. = Otto. R. Krause G. With b. H. Special business for mining and smelting supplies, Beuthen, OS handbook number 14), transport traces