I managed to get my hands on another press photo.
On Ebay the seller mentioned the following:
"originales Ferrari 365 GT4 2+2 Pininfarina Press Photo
1972, aufgenommen von Giorgio Bellia auf der Teststrecke in Fiorno, vermutlich Fahrgestellnummer 15897"
The name of this photographer was new to me. Unfortunately I was not able to find much more detail on him. I wonder if he's still alive?