Vox were primarily an electronics company, not a luthiery. When some hollow-body models were required in 1964, Vox outsourced the production of Vox Lynx, Challenger, Cougar bass and Escort bass guitars to Italian manufacturer Crucianelli. Naturally this factory had it's own part supplies, so hardware and fittings are quite different to those seen on the Vox guitars built in Britain up until that point. Production of these models ceased in 1965.
Knobs are etched VOLUME and TONE with numbers 1-9 and gold metal insert. Each had it's own Vox part number: Volume 09-1605-0 and Tone 09-1606-0.
These controls may also be found on guitars made by Crucianelli, branded Crucianelli, Élite and Imperial.
List of Vox control knobs