John Suhr contacted me in July 2011, mentioning that the guitar was made from Structural Foam, not wood on the body. It was an experiment and Mark liked it. And John corrected that it was not the first guitar that was built under the Pensa-Suhr name like the book mentions.
Mark Knopfler used it on Two young lovers during the On every street world tour 1991-1992. Click here for a closeup.