INTER-ALLIED COMMISSION - BRITISH COMMISSIONER, 5 Pfg dark opal green Steelworks and Dove of Peace 1920 on blank black-and-white postcard, double-circle OPPELN 25 3 21 * * b (OS handbook no. 237.7), violet double-circle official seal ALLIED ADMINISTRATIVE COMMISSION UPPER SILESIA - BRITISH COMMISSIONER (OS handbook no. I.0.d), this card also illustrated in OS handbook (p. 15), very neat strikes, good condition