MUROW 19.10.1920 ZKr (OS handbook number 220.1) on cover with 5 Pfg opal green vertical strip of three, 25 Pfg dark brown, 50 Pfg dark gray smelting works and dove 1920 to Chemnitz, arrival postmark (21.10.1920) at back, signed Zirkenbach, time typical traces of age and usage