Epiphone Thunderbird E1 Bass (Vintage Sunburst)Classic 3 point fully adjustable bridge with Epiphone TB Plus bass humbuckers. The Epiphone EBTBVSBH is a Vintage Sunburst Thunderbird IV 4 String Bass Guitar. The Thunderbird Bass, first issued from the legendary Kalamazoo factory in 1963, was for a time the only bass available from Gibson or Epiphone. But really, what else could you need? The Thunderbird's unique "reversed" zig zag body design and equally distinct headstock was the brainchild of