ALTBERUN, 10 Pfg orange-red, 25 Pfg dark brown, 50 Pfg dark grey Steelworks and Dove of Peace 1920, 10 Pfg lilac-red two singles, 50 Pfg dark brown-violet two singles official April 1920, mixed franking on letter to Rybnik/Upper Silesia, double-circle ALTBERUN 30 5 22 * * a (OS handbook no. 001.1). Overfranked by 5 Pfg, nevertheless very rare commercial mixed franking of definitives and officials, age and use wear typical of period