BISMARCKHÜTTE, 10 Pfg orange-red block of four, 30 Pfg yellowish orange block of four, 40 Pfg green-olive vertical pair, Steelworks and Dove of Peace 1920 on postcard to Reading, PA / USA, single-circle BISMARCKHÜTTE 11 2 22 (OS handbook No. 022.1), rare cancel and destination, interesting early inflation-period document, neat perfectly central strikes, good condition