BISMARCKHÜTTE, 10 Pfg on 20 Pfg blue overprint Type III a provisional issue 1920, 5 Pfg green, 15 Pfg grey-violet, 20 Pfg blue with gutter attached at bottom, 30 Pfg orange Steelworks and Dove of Peace 1920 as mixed franking on registered letter to Winterberg / Westf., double-circle BISMARCKHÜTTE 8 5 20 * (OBERSCHL) b (OS handbook No. 022.3), age and use marks typical of period