I have investigated further on the car and have found some basic info.
It was built on a -41 MB 170 VK Kübelwagen chassis, which is some sort of a jeep?
Builder was a Mr Oddmund Kolden in Lom
He built it on order from a teacher in Otta (not far from Lom). This was problably around 1950
The car was later in Østerdalen, until it was bought by the person who owned it when the picture in this puzzle was taken in 1999.
His name is Björn Foslund, and he sold it to a person in Drammen. I have not found the name of the current owner