RYBNIK, 5 Pfg green, 10 Pfg red-orange, 15 Pfg violet-grey, 20 Pfg blue, 50 Pfg dark grey Steelworks and Dove of Peace 1920 on black-and-white picture postcard sent registered to Funchal (Madeira Island) / Portugal, double-circle RYBNIK 11 3 21 * * a (OS handbook No. 293.3), unusual rare destination, age and usage wear typical of the period.