One of those useless bits of trivia which takes up space in my brain (space that would be better suited to, oh, say, remembering where I left my house keys or what the next chord change I'm supposed to play is) is remembering all of the keyboard instruments listed on the inside jacket of Rick Wakeman's Six Wives of Henry VIII album ...and I'm 99.99% certain there was no Hohner Clavinet. (Wikipedia confirms this, fwiw.)
Any of the stuff that sounds Clav-ish is coming from his RMI 368 electric piano/harpsichord. (Or the real harpsichord that he also used on that album.)