Turret 45A (Walltown) (grid reference NY67406634) is located 90 metres (98 yd) east of the normal measured position, and measures 5.8 metres (19 ft) by 5.5 metres (18 ft) externally.[2] It was excavated in 1883, 1912, and 1959.[3] The 1959 excavations uncovered two centurial stones to the west of the turret.[3] The turret walls were consolidated and stand to an average height of 1 metre.[3] The turret was constructed without wing walls, with the curtain wall abutting the structure, rather than being bonded with it. Because of this, It is believed that the turret was originally a free standing structure, predating the wall, and probably built as part of a system of watchtowers associated with the Stanegate.[2]