Hardly a find...with all due respect to our friend Pawel.
That is an old photo that's been on the Daimler Classic Archives Media site since, well, forever. There are more; this was not the only design exercise of the Pagoda, but one of them that was taken to full scale model. Curiously, many of the full scale models of MBs of that era show those large "gangster" style whitewall tires; all the more curious since Europeans generally despised WW tires (and for the most part still do). So it's kind of laughable.
One page I did in the Pagoda Style book noted a number of Paul Bracq design exercises for "what would become" the Pagoda...for the newbies (those who were not here on the forums in 2009-2011) Pagoda Style was a book I designed and produced and was released in 2011. This is a one-page excerpt.