Eckernfoerde, Germany. 23rd Mar, 2015. The U-Boot "U35" during the commissioning ceremony at the naval base in Eckernfoerde, Germany, 23 March 2015. Photo: Markus Scholz/dpa/Alamy Live News Stock Photo - Alamy
Plastic Models on the Internet: Kit review vol.21 : U-Boot Typ II
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U Boot Wilhelm Bauer ehemals U2540 Typ XXI 21 :: Museum Find | Radiomuseum.org
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Why do people say that the German submarine type XXI was a bad submarine? - Quora
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German Submarine U-21 3D Model $25 - .fbx .unknown - Free3D
A Nazi Superweapon - the "Elektroboot" | Paradox Interactive Forums
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German Navy Submarines U-Boat type XXI & XXIII Pit-Road W-223
