K-Wagen was designed by Joseph Vollmer and Captain Wegner (Weger?) and ordered in December of 1917, it was to enter service in 1919. It was designed so that it could be broken into four parts for rail transport. K-Wagen had a boxy hull mounted with sponsons. Armor protection ranged from 10 to 30mm and entire tank weighted 148-150 tons. The vehicle was to be 12.7m long, 3.0m wide (6.0m wide w sponsons) and 3.0m high. It featured roller-type tracks and was powered by two Daimler-Benz aerial engines (each producing 650hp) with electric-magnetic clutch transmission. Maximum speed was 7.5km/h. K-Wagen's armament consisted of four 77mm guns (two mounted in each sponson) with 800 rounds of ammunition and seven 7.92mm Maxim 08/15 machine guns with 21000 rounds of ammunition. Modified U-Boot communications and control equipment was to be used. It was to be operated by the crew of 22 men. Production was delayed because of the material shortages and only two were under construction in November of 1918 at Riebe-Kugellager factory at Berlin, but were not completed. Both were eventually scrapped by the Allied Control Commission.