The following description of this bizarre guitar was posted on the Experimental Musical Instruments website. It has unique aspects to its design: the steel body resonates giving a reverby type effect. You can visit this link to listen to an MP3 of this guitar in action .
"This guitar uses a unique pickup system, in connection with some unusual acoustic properties, to create its own strange and lovely sound. The soundboard is a flexible steel sheet, and the vibrations of the strings are fed directly through the bridge into this sheet. (The foam pads around the edges, aside from looking ugly, allow the player to hold the guitar with minimal damping to the vibrations in the sheet.) There are two pickups. One is a magnetic pickup (a homemade version of the sort normally used on electric guitars) which is positioned to listen not directly to the strings, but to the steel sheet. The other is a contact pickup, also on the steel sheet. During playing, by moving the neck, the player can flex the steel, causing shifting resonances within the sheet even as the notes sustain. It also varies the nature of the contact between the bridge and the sheet, for another layer of varying tone quality. The two pickups pick up all of these ever-shifting filtering and resonance effects."