Home / United States / World War II / Posters / Large WWII Electric Boat Company U.S. Navy Combat Action Print: “Giant Killers” SOLD! Large WWII Electric Boat Company U.S. Navy Combat Action Print: “Giant Killers”$75.00 Copyright 1943. Approximately 19-1/2 inches by 24 inches. Excellent condition. Sold! Item Number: 79538 Category: Posters