The Born To Rock F-4B Electric Bass (1995) has a patented design with the following specifications:
Hollow aluminum-tube-frame body
One piece ‘headless’ Plexiglas neck and fingerboard
34 Inch scale
Precision bass-style split coil-pickup with volume and tone controls
The bass relies on a lightweight frame that holds the strings at tension over a tension-free neck, which avoids the warping associated with wooden instruments. Since the open, skeletal design has no conventional headstock, the tuners are mounted below the bridge at the bottom of the body. This bass guitar belongs to Steve Miller.
Photographed as Part of the Exhibit Play It Loud: Instruments of Rock & Roll at the Metropolitan Museum of Art.