Postally used with message on verso. In a stiff plastic slip. This is one of SEVERAL THOUSAND (c. 1895-1945) German and Japanese military, mainly naval, postcards we have acquired. We will be listing them on eBay over the next number of months. Weddigen, U-Boat, U-Boot, U-Boote, Unterseeboot, Unterseeboote, Sub, Submarine, Submarines. Very fine condition.