The distance between the strings at the bridge level is 55mm
Serial Number
http://www.steinbergerworld.com/Xbridges.htm#5Narrow
STEINBERGER XL5 Strings Fretless,narrow bridge, 1 piece molded body/neck construct,rectangle body,24 frets phenolic fingerboard,2 HB EMG Pick-Up,2volume/1tone controls, All original with Original Gig Bag. Real super excellent Conditions and SUPER RARE. code BA607
Who wouldn't recognize a Steinberger L-series if they saw one? The headless design is completely unique and regardless of why Ned Steinberger decided to create this design (less weight, better for the materials used), the result is something completely and totally unlike anything else the guitar world has ever encountered. The sound of an L-series is smooth and clean, and the instrument never truly goes out of tune with itself due to another Steinberger innovation that allowed for a single knob for tuning.
LAST SELL FOR 7500 USD !!!
https://www.talkbass.com/threads/steinberger-xl5w-or-xl-5w-xl5-w.1186588/
http://www.lionseek.com/guitars/brand/steinberger/for-sale-steinberger-xl5w-or-xl-5w-xl5-w-3e80fd
Artists who played Steinbergers:
Eddie Van Halen, Joe Perry, Rick Derringer, Stevie Ray Vaughan, Leslie West, Vito Bratta, Warren Cuccurullo, Mike Rutherford, Alan Holdsworth, Buck Dharma, Johnny Winters, Richie Scarlet, Steve Morse, Dave Larue, John Mayall, Paul Stanley, Andy West, Geddy Lee, Sting, Bill Wyman, George Lynch, Brett Garsed, Reeves Gabrels and many others.
http://www.babiczsignature.com/steinberger-sound.htm
http://www.musicyo.com/steinberger/history.aspx
BILL WYMAN
Artists who played Steinbergers:
Eddie Van Halen, Joe Perry, Rick Derringer, Stevie Ray Vaughan, Leslie West, Vito Bratta, Warren Cuccurullo, Mike Rutherford, Alan Holdsworth, Buck Dharma, Johnny Winters, Richie Scarlet, Steve Morse, Dave Larue, John Mayall, Paul Stanley, Andy West, Geddy Lee, Sting, Bill Wyman, George Lynch, Brett Garsed, Reeves Gabrels and many others.
http://www.babiczsignature.com/steinberger-sound.htm
Maurizio Vandelli
Vintage 1981 Steinberger Brochure