Lord K’s Garage #111: Omnibuses for the Autobahn:

1938 Opel Blitz with Aero-Bus body by Ludewig Bros.

Other photos of this type are far less famous (and less atrractive, in my humble opinion):

Yes, it’s not the same coach. But nearly similar, save for the front fenders.

And finally, a Ludewig masterpiece:

I’m not sure about the chassis’ make. Anyway, enjoy the detail:

Have you noticed the elevated driver’s position? Amazing. I wish I knew more about this beauty.