Kassel trip 1939, card from Prague 28.7. With 1, 20 Kc overprint stamp in two countries mixed franking with Hindenburg stamp booklet pane and further se-tenants used Frankfurt 30.7, arrival Kassel 30.7, further to Linz 1.8, flight stamp multiple, as well 1 x in colour error brown violet, superb (winner 460)