The buyer guide book is for Porsche Carrera. It printed for the auto company "Lechner" Germany. That model (what it shown in the magazine) produced until 1993.
It's a nice movie but the date isn't correct. There was a wired key phone with one line screen that is not possible in 79. Steve Vincent was wearing funny model of Winchester stle shirt ( which its collar and cuffs has another color than the shirt) and wide trousers which was mode in beging of 90's.