Second photo
Oivind,
I believe this car is a Series 4 as in studying the radiator,it appears to have a smooth outer edge on the radiator whereas the Series 3’s and earlier cars have a sharp crimped soldered outer edge on their radiators.I believe the car in the photo is a 1916-1917 model C-4 judging from the proportions.A look at the front wheels would be conclusive.
Bill
Clearly a Series 4! I can make out the smooth outer edge of the radiator.