Robben Ford is another big alnico IV user.
All of the original PAFs(not the later patent number humbuckers which used Alnico V)used either Alnico II, III or IV.Generally the Alnico II ones were liked least and the best sounding ones were Alnico III or IV. A collegue of mine has had several originals that he is fortunate to own analysed so we know this as fact. the Alnico IV we have made for is is based on original samples, all individually cast and unpolished.