BRESLAU-KATTOWITZ RAILWAY POST, 50 Pfg dark grey, 80 Pfg lilac-brown Steelworks and Dove of Peace 1920 on coloured picture postcard, railway-carried from Beuthen/Upper Silesia to Mersch/Luxembourg, elliptical railway post BRESLAU - KATTOWITZ Z. 342 -- 20.3.22 (OS handbook no. C 02.10a, type II/1), rare railway cancellation and destination, age and use wear typical of period