Yes, it is the Triomobil, built from 1903 to 1909 by Otto Spiess in Berlin-Spandau. He went bankrupt in 1908, but managed to reappear in 1909 as managing director of the company Günther & Co. which continued the Triomobil manufacturing. But the adventure ended after another six months. The attached ad must be from 1909, after Günther & Co. failed. Judging by the handwriting Otto Spiess tried to assemble the last Triomobil from leftover parts.
Well done, one more point for you.