305/52 mm gun on a railway transporter

These guns appeared on the Soviet naval base of the Hanko Peninsula in September 1940. They were transported here by rail, which was not a trivial task, since the bridges of the Finnish railways were not designed to withstand loads of such weight. But, the Party (CPSU) said: it is necessary! The transporters had to be dismantled, the guns and gun's cradles were transported on separate platforms, and then were assembled on the spot.