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. It actually is a "R" Custom, see here a picture of the headstock. See here for a picture of it's original case.
Rudy Pensa sent this red custom
prototype to Mark as a Christmas present, to AIR Studios
Montserrat in December 1984, where Dire Straits were
recording Brothers in arms. Along with his Pensa-Suhr
MK-1, Knopfler used this guitar to record the song Heavy
fuel. Knopfler used it on Two young lovers
during the On every street world tour 1991-1992.
Click
here for a nice one from Australia 1991 and
here for a nice one from Rotterdam 1992.
This guitar was auctioned at
Christie's
in London on 31st January 2024. It
was sold for 113.400 Pounds.