This is Erich Topp (1915-2005) He had Oak Leaves & Swords, and Commanded the U 57, and 3 more, later. This postcard was signed with a WW 2 style pen. He commanded 4 different U Boats during the war. Erich sunk 35 ships, with a G R Tonnage of 197,460. This postcard is nice. CLICK THE IMAGE TO SEE IT BETTER.