I see I've been trying to sell my spare copy of Schweizer Autos for many months now. Anyhow this is not the 1906 Doktorwagen. One more try
I've been quite lucky & patient....I set my budget quite low to buy more books and from time to time I still find the right occasion
.
Back to the puzzle, according to that book, in 1910 there was a Typ A 2-seater.
According to that same source (that I still have to translate...) around 1908 there were 2 cars named Modell 1: the Typ A, light 2-seater kleinwagen and Type C, 2-seater kleinwagen.
Puzzle car seems to be a 2-seater kleinwagen so I'll go for a Typ C from 1908, because the Modell 2 Typ D Doppel-Phaeton of the same year in the following picture shares the same lines.