Periscope view from a German U-Boat as it hit and sunk an enemy vessel with a torpedo, 1942.
Other details are unknown.
Book suggestions ⤵️
📖 Iron Coffins: A Personal Account of the German U-boat Battles of World War II (Herbert A. Werner, 1968) .
📖 U-Boat War (Lothar Gunther Buchheim, 1986)