mass franking 10 M purple brown vertical strip of three and horizontal strip of five, 20 M dark gray purple postage stamps issue 1922 on cover from Katowice (vorm. Katowice) to Beuthen, still used German ZKr KATOWICE 14.4.1934 (141.20) (stamp error date given 1934 instead of 1923 ! ), time typical traces of age and usage