The Vox V1 pickup was fitted to the earliest British-built Vox instruments: the Vox Clubman bass, Bassmaster, and most examples of the Vox Symphonic. It was also fitted to the earliest runs of Vox Phantom basses. This is a really simple pickup: a single coil, wrapped in waxed cloth, around a central magnet. The chrome cover just pushes on. There are no polepieces, and both Vox guitars and basses used the same part, (US part number 09-101-0), though higher end bass models (Phantom IV, Symphonic bass) changing to the white plastic V2 at least by 1964. Actually this change does not seem to have been absolute in the case of the Symphonic.
The removable chrome covers were either engraved VOX, with others left plain. The cover simply lifts off. Instruments were fitted with logo'd, plain or a mix of covers, though earlier guitars are far more likely to have all-engraved covers. Wiring is very simple, just a blue hot, and uncovered ground wire.
The pickup is designed to be scratchplate mounted: the bassplate is straightforward in design; made from pressed aluminium. The coil and central magnet just sit on top, held in place by the chrome pickup cover. The bassplate holes are threaded for the mounting screws; the springs act as spacers between the bassplate and scratchplate.
The images below show a number of views of the V1, as fitted to several early JMI Vox bass guitars.
List of Vox bass pickups