COSEL, 20 Pfg blackish violet-blue, 30 Pfg red-orange, 2 Mark black-blue, 5 Mark sienna official July 1920 on registered letter with return receipt to Neustadt/Upper Silesia, double-circle COSEL 13 7 22 * (OBERSCHL) e (OS handbook no. 053.5), arrival (18.7.1922) on reverse, interesting early inflation-period document, age and use wear typical of period