A metal turret, pillbox which could be rotated through a full 360 degrees, set on a steel and brick-lined pit. It was designed for a machine gun to be fired either through the front loophole which was further protected by shutters, or through the circular opening in the roof in a light anti-aircraft role. Nearly 200 Turrets were installed in WW2 but salvaging of the metal after the war means that only just over 30 remain today.
This survivor is on the seawall at Cley Next The Sea, Norfolk. The turret had a garrison of two men or, if necessary three men, for whom there were folding seats inside One man could rotate the cupola which is on roller bearings.