Just watched a vid on YouTube of all the young dudes (Mott the Hoople) and @ 2:02 there is a few seconds of the bass player.
Link - http://www.youtube.com/watch?v=mfwVfEXJhQQ
I can't identify the bass but wow
it must be a custom one off job.
Can't say I'd want one but it sure is unusual.
P.S. I saw them Dec. 20th 1975 in PGH, Pa. with RUSH!
RUSH opened then Mott and the headliner was Kiss
38 years later only RUSH is still Rockin'
P.S.S. Yeah i'm old