Quite crowded.
For one point, please respond and identify this bus.
up
up again
French ?
No
German marque?
Edit: If so, KEW (Kölner Electricitäts-AG) circa 1899?
Austrian ?
German, but not KEW
Kuhlstein Wagenbau 1899?
Yes, built in 1899 by Kühlstein. This vehicle is connected with its constructor's name. Locked for you to find it.
Sorry, I was away.. what would you like to know exactly?
The name of the man who engineered it, as it is not called Kühlstein, but after him, in many sources.
Vollmer?
Yes, one more point for you.