This unit also appears on early British guitars by other manufacturers: who actually produced these pickups is not clear. The height of the pickup cover is 5/16" giving a total height of 3/8". Although this pickup and the later Vox V1 are broadly similar in construction, there are some differences: the V1 has a shaped, one-piece baseplate that includes mounting tabs, whilst these pickups have a separate bar attached to the bottom. The distance between mounting holes is approximately 88mm on both pickups however. The pickup is mounted to the scratchplate with two screws through the mounting bar. The chrome cover is not fixed to the rest of the pickup, it simple lifts off to reveal the coil below. This is really as simple as guitar pickups get. The coil of wire, covered in cloth and wax to prevent movement, is wrapped around a central magnet, the whole thing sitting upon the base-plate. This one is quite square - other examples of this pickup I have seen have far more curved corners. Compare this with the later Vox V1 that follows the same basic design.
List of Vox guitar pickups