I do like the Warwick Reverso. But like a Fender Bass V it's not pretty seeing it vertically. It looks too strange and fat. But if you strap it on, it looks gorgeous.
Warwick made several basses for Clayton, all custom shop. Several Star Basses, Streamers, Reverso's. Even in the Warwick time, Fender made some very limited Custom Shop basses with Clayton's name. I remember a gold sparkle? I guess like Pete Townshend, with a Rick sig, a lot of Gibson sigs and playing mostly Fender's and Fender amps, those very famous people are 'above' endorsements? Nobody cares if they play more brands?