The Velvet Underground had an edorsement deal with Vox instruments. Cale played this bass a lot in the Sixties.
One of Vox's most iconic bass designs, the Vox Phantom IV was introduced in 1963. This bass featured two single-coil pickups, volume and tone controls, and a unique five-sided body. Originally, this bass was made in England, but production changed to Italy by the late '60s. The earlier English-made basses are more sought-after.