i have a pic of howe with one possibly in a foto session with his other collection. will look for it. was taken early '80's me thinks ! he was holding the headstock near his face. had rick/gibson kluson keys.
Never heard that one before. I know Steve Howe likes his EB-4 and it appears on his solo stuff, along with his '74 4001, but I can't think of any part of The Yes Album where Chris would have used this bass. I don't doubt that he owned it...
so if squire had access to howe's guitars...anything is possible, but i think it belonged to howe, thus the pics we've seen. and, was that a one-off ? he's the only human i've seen with one. they used lots of weird stuff to make tracks with on the albums that we don't really know about. maybe even a set of spoons, perhaps ?! who knows. i think steve would know this answer more than chris as he doesn't expound on things as much, giving less room for errors or fantasy. btw...there were supposed plans for a squire guitar book at some point in the '80's as well as an entwistle book.