watch'n/play'n along to some Earnest Tubb on youtube ... and saw this bass...from about 1:45 till the end you get a purty good look at it... http://www.youtube.com/watch?v=hjcwNKpiAnQ
Yup ampeg bass. One of my dream basses, but at $4000 new or used, way out of my price league http://www.talkbass.com/forum/f8/love-ampeg-other-scroll-basses-843684/
Yep, specifically, that's an Ampeg AUB-1 Scroll Bass from 1966. It's a rare one, too. Ampeg only made a couple of them in that color scheme. It's white with copper-colored trim. We've talked about the rare white ones in the Love Of Ampegs thread. I had one of them here in my shop for some work a while back.
BTW, Bruce is "The Man" as far as those are concerned. I have the honor of owning one of his. I have a pretty large collection, from cheap Korean axes to pre-CBS Fenders. His has the best craftsmanship I've ever witnessed. By far.