That's the name I was after, though I must admit (after a look in the right book) that it is not correct. NSU started with three cars at the Prinz-Heinrich-Fahrt in 1909. All three cars were 10/20 HP taken out of the regular production. One was driven by NSU's managing director Carl Schmidt, his copilot was the engineer Fidelis Böhler (who will be famous for his Hanomag 2/10 PS in the future). But the pictured car was driven by Albert Schmidt-Schröder. The Prinz-Heinrich-Fahrt started in Berlin and went over 1836 kilometers during seven days, with stops at Breslau, Tatra, Budapest, Vienna and finish in Munich. All three cars were driven to Berlin and from Munich back to Neckarsulm, thus adding 1200 kilometers to the total. The picture was taken at the beginning of that tour in Neckarsulm.
One more point for you, congratulations.