EMMAGRUBE 27.4.1920 ZKr (080.2) on package card with mixed franking and mass franking 20 Pfg blue vertical strip of four and five single stamps postage stamps issue drawing numbers 1920 at back, 20 Pfg blue vertical strip of four and single stamp postage stamps issue drawing numbers 1920 on face, 5 Pfg green postage stamps issue green on face to Wroclaw, transport traces