Humphrey Smith is asking: "Mystery machine with my grandfather seated in the front passenger seat. Any ideas anyone?"
We see typical german design. Stretching form the V-shaped radiator to the nicely curved bathtub body ending. The exhaust plumbing protruding from under the bonnet (two or three pipes?) plus the sheer size of the machine suggest that we're looking at a high quality offering, built around 1920. First question: how many cylinders?). Our guess is that we see a extra large four cylinder. A 1918/19 Benz 70 HP perhaps? We see strong similarities with this more conservative bodied car at Mercedes-Benz forum.