This postcard features a rare WW2 photo of a 240mm Howitzer, with no postmark and written in 1945. The postcard is a single unit and falls under the category of non-topographical postcards, postcards, and collectibles. The era of the postcard is during the Linen period (1930-1945) and the subject is the Army during the Military Era of World War II (1939-1945). The postcard is a great addition for collectors of militaria and is a must-have for those interested in the history of the Army during WW2.