Gustav Mees seems to have invented the desmodromic valve system in 1896. He was from Barmen (now Wuppertal), but worked in Wetzikon, Switzerland around 1898. I found this picture of a Victoria built in 1898 by the "Erste Automobilfabrik der Schweiz" in Wetzikon. It looks rather similar, doesn't it? The head of the workshop was Franz Brozincevic of later FBW fame. Automobil Revue states that "a few dozens" of those Wetzikons were built. So I guess the puzzle car is one of them.