This is a mint block of four 4 Pfennig stamps issued by Nazi Germany during World War II, featuring a profile portrait of Adolf Hitler. These definitive stamps were part of the common issue series introduced in 1941, inscribed with "Deutsches Reich". Printed in a deep blue shade, they reflect the propaganda-oriented design typical of the regime, emphasizing Hitler’s imagery. Such stamps were widely used throughout occupied Europe during the war. Blocks in mint, unhinged condition are increasingly scarce and sought after by WWII-era philatelic collectors.