German Reich 20 Pfg. (2) and 10 Pfg. Germania in mixed franking with 5 Pfg. postal stamp Silesian smelting works and horizontal strip of five 20 Pfg. numeral with gutter extension left front- and reverse being a correctly franked on registered package card from Gliwice *10 28. 4. 20 to Berlin Wilmersdorf with arrival postmark (cancel visible on the back), form in the margin with transport traces respectively lower right with corner crease, in this kind inadmissible mixed franking without postage due, commercially usage in of this kind are only a few pieces recorded!