Antique Real Photo Postcard. Identified as a 6-inch rifle captured on the German ship Emden. Divided back, AZO stampbox, unused. Condition: This is an original photo postcard, not a copy or reproduction. It is in excellent condition. Comments: Emden was a light cruiser built for the German Navy (Reichsmarine) in the early 1920s. She was the only ship of her class and was the first large warship built in Germany after the end of World War I.