GLEIWITZ, 30 Pfg reddish orange vertical upward-reading overprint, horizontal pair from lower left corner, 20 Pfg dark violet-blue vertical downward-reading overprint, official issue April 1920, 1,25 Mark Prussian blue horizontal overprint official issue July 1920 on registered letter to Laggenbeck / Westphalia, single-circle GLEIWITZ 20 3 21 * b (OS handbook No. 089.3), very rare cancel apparently used only on 20.3.1921, plebiscite day, arrival (13.7.1931) on reverse, age and use marks typical of period