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Kanone K 12

K 12, Railway guns

This guns were made by Krupp. The first gun was designated as the K 12 V. The V stands for "Versuch", the tryout version. This gun had a steel cable along the barrel to provide for extra stiffness. It was operational in March 1939. The second gun, the K 12 N, was ready in July 1940. The steel cable wasn't neccesary anymore due to changes to the hydraulic system.

CaliberBarrel lengthGun weightShell weightRate of fireMax range
21 cm33.3 m302 tons107.5 kg6 per hour115 km