Manufacturer: Gebr. Lempe, Keil
Postcard number: 128
Postally used 9 Apr 1915. Imperial Navy Post. As the submarine was torpedoed before the post date it may be that this card was posted from Helgoland.
Postcard number: 58
Postally used but date unreadable. Navy ship post.
Postcard number: 20143
Postally used 24 Aug 1919.
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