Thereafter , the trail of the gun was lost .
In summer 1945 Schwerer Gustav was studied by Soviet specialists and in autumn of the same year was transferred to Merseburg , where the Soviets were gathering German military material .
The trail of the gun was lost .
In summer 1945 Schwerer Gustav was studied by Soviet specialists and in autumn of the same year was transferred to Merseburg , where the Soviets were gathering German military material .